/sci/ - Science & Math

space is gay

>>11480407
fpbp

so I guess 5 uncovered something interesting

>>11480407
that's why we need to penetrate it and make it our bitch

>>11480407
YOU'RE gay

>>11480402
So uh
Dark matter annihilation based propulsion?

>>11480470
you're thinking of antimatter

>>11480475
No, I'm thinking of the hypothesis that dark matter particles may be their own antiparticles, which would mean colliding any two dark matter particles would result in an annihilation.

Come up with some way of getting dark matter to collect in one place, get the density high enough that collisions become likely, and suddenly you have a hyper efficient power source that runs off of a material that makes up the majority of all mass in the universe.

What's going to happen to Boeing? Even if they get bailed out in the short term, how are they going to recover their reputation, capability and technical edge in the long term?

>>11480529
>What's going to happen to Boeing?

When the pandemic ends they will go back to selling planes and hopefully the 737 MAX will be allowed back into service shortly after, in turn alleviating all of their financial woes.

>how are they going to recover their reputation capability and technical edge in the long term?

In which industries?

>>11480559
Is it possible that the MAX gets rushed through recertification to save the company?

>>11480529
>What's going to happen to Boeing?
They'll keep getting assistance from the government, because they're among the largest aerospace manufacturers in the country and losing them would be disastrous for national economic security.

>Even if they get bailed out in the short term, how are they going to recover their reputation, capability and technical edge in the long term?
Their reputation will heal over time due to their long history and expansiveness in the industry. As for their capability and technology edge? They'll always have the edge in commercial aviation because they're the Microsoft of commercial flying. As for space flight? They'll probably fall behind compared to other companies like SpaceX or Blue Origin since Boeing doesn't seem to take space flight seriously (and why should they? It's not their largest source of profit). Unless however, they get the rights to Vulcan if ULA splits and get's plenty of government contracts for it to allow them to iterate on the design.

Although, Boeing will most likely still be a dominant force in American space flight for a long time due to their history, large industry, and favoritism within the government. However, they might not be a leader in the future unless NASA or USSF gives them an ambitious contract.

>>11480323
RIP

>>11480529
Massive bailout because they'll be needed in the upcoming war with China.

Now, what happens to starlink's future market prospects is an interesting question.

>>11480567
No way, he FAA have been really tough on Boeing so far e.g. even forcing them to replace components which aren’t even to do with MCAS, such as the bundles of wiring which the MAX shares with the NG and the engine insulation panels in case of a direct lightning strike on one etc. It’s easier to argue that Boeing are being unfairly treated than too leniently.

>>11480529
BOING!

>>11480497
All you need for your dark matter generator power source is to lug a star around.

>>11480593
What is the sound of stocks artificially bouncing?

>>11480593

>>11480593
The flag is ours.

>>11480593
Over 9000 milliseconds in GIMP.

>>11480593
Fucked up transparency. Here's fixed version.

Tesla isn’t doing much better...

>>11480642
>>11480529
This is just the correction
Look at that retarded jump in stock prices that happened across the board
Also it’s damn foolish to think a tanking stock price changes anything for a company

>>11480497
lol there was an idea to use that as the basis of a ramjet vehicle
https://arxiv.org/vc/arxiv/papers/0810/0810.1493v3.pdf
Seems like it'd be better to just use fusion/antimatter propulsion considering the difficulty of working with dark matter though.

The Russians are steadily progressing...

>>11480699
>>11480497
BTW this assumes axions are actually a thing. Sort of presumptuous to consider dark matter viable fuel when we don't even know what it is.

>>11480710

I'm gonna keep shilling HOPE around here. This shit's just too cool to pass up.
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20120002875.pdf

>>11480710
What would be the difference if starship was riveted instead of welded?

>>11480731
it would be very, very heavy
also could it be made proof against leakage?

>>11480731
More prone to popping or much heavier.

>>11480737
Well airplanes are riveted and they're not heavy, and don't generally leak as well

rivets are heavier than welds
always

>>11480710
>>11480713
What's this?

>>11480742
Is that supposed to be funny or are you serious?

>>11480751
What exactly do you disagree with?

>>11480755
So you were serious. I see.

>>11480747
Soyuz-5 barrel sections

>>11480763
so what does "soyuz" mean that they can get away with calling an entirely new rocket "soyuz"

How will the spread of the Chinese CoronaVirus from Wuhan effect the SpaceX Boca Chica facility?

>>11480771
Doesn't it mean Union?

Might as well just mean Rocket.

>>11480763
Interesting I thought that they would stick to Angara with it's "dial-a-rocket" style of boosters. I hope it goes well though. Maybe they can find a way to recover and reuse it?

>>11480771
It’s basically a Zenit first-stage (RD-171) with a Soyuz second-stage (RD-0124), so it’s got some Soyuz heritage.

>>11480783
>Interesting I thought that they would stick to Angara with it's "dial-a-rocket" style of boosters.

They still are, just not in the way you’d expect...

>>11480721
>fusion propulsion

:O

>>11480745
Makes sense
More force concentrated on rivet points means each river needs to be stronger (heavier) than a weld along the same length of material that the river supports

>>11480742
Airplanes have a shit mass fraction, and they're sealed up with compound. You can't do that with cryogenic propellants and you can't do it on parts that thermal cycle a lot by a large amount.

>>11480774
>shut them down if they get sufficient number of workers sick
>indefinite delays for non vertically integrated components
>make musk run out of money
Pick one or three.

>>11480763
Zenit - Ukraine = Soyuz 5

>>11480774
not much. South Texas is pretty isolated, right? They have more chance of catching it from infected illegal immigrants at the taco truck.

>>11480841
The RD-171MV is essentially an upgraded RD-171 which has also been stripped of it’s Ukrainian components.

>>11480810
Rivets are widely used for aluminium, especially thin, because they're very predictable, cheap and easy to install, while welding it has a lot common with black magic.

>>11480815
Airplanes have much less favorable loads distribution and are required to last through thousands of flights, so most of that weight comes from structural considerations, not construction methods. They do cycle to pretty low temps as well, though still well above typical cryo I admit.

>>11480884
Airplanes have to be taken apart regularly and drilling out rivets is easy

>>11480847
Musk is refusing to close a Tesla factory even after the governor of California told him to, so I imagine he's even less willing to close down boca chica.

>>11480893
Ironically, this decision is making Tesla’s stock fall faster (than everybody else apart from Boeing and airlines) because it gives off the impression that he’s scared shitless to close the factory because Tesla doesn’t have enough cash on hand to survive the duration of the shutdown.

Its been a long road
Getting from there to here~

Most of NASA may be working from home, but the Artemis train isn’t stopping...

>>11480892
Uh, no, if you have to drill rivets to get somewhere on airplane you're doing something wrong. All the access and inspection covers use screws or special latches and the rest of the plane is not designed for disassembly in normal use.

>>11480807
Yeah most people online seem to think that fusion and electric propulsion is a meme but imo it's the only reasonable way to get to the outer planets.

>>11481007
NSWRs and OCGCNTPRs can pull it off as well.

>>11480402
dead thread

>Falling for the NASA meme

>>11481555
Not much is happening due to corona.

>>11480721
>1. draw fuckhuge space ship
>2. use ?????? for propulsion
>3. rapid, cheap and reliable interplanetary travel

Reading through Zubrin's book (from 1996) and found this gem concerning NASA's headspace:

>At a conference a few years back I quizzed a NASA official who advocated a multidecade program investigating zero-gravity health effects on humans prior to a piloted Mars mission. "Why not just employ artificial gravity?" I asked. "We can't do that," he said-"all our data is going to be for zero gravity." Get the picture?

>>11480994
The artemis 1 train. We‘ll see about any actual missions that go beyond empty capsules to nowhere.

>>11480994
>mission critical milestone to move capsule from a to b

Absolute fucking state of NASA, wonder how man subcommittees they needed to determine that?

>>11481678
Name of book and page number? That sounds depressing as hell. Then again makes sense for post-Apollo NASA, there's more research to be made for zero-g than for artificial-g so it's a more secure funding opportunity.

>>11481682
>empty capsules to nowhere.

Is lunar orbit considered nowhere? Also what is Artemis 2?

>>11481688
>wonder how many subcommittees they needed to determine that?
One for outbound travel. One for inbound travel. One to work with the DOT. One for the transportation vehicle. One for the status of the Orion capsule during transport. Two for mapping the trip. One to handle any transportation authorities. One to monitor the capsule. One for Boeing interfacing. Three to retighten the bolts every 40 miles. One to manage the subcommittees. Two to manage the subcommittee that's managing the subcommittees.

All for a small budget of a few tens of millions of dollars. Space is hard. It ain't that easy in rocketry. Please for the love of God and Shelby, stop comparing us to SpaceX.

>>11481555
expect only military and StarLink missions from US soil in the near term. So that would be:

26 Atlas V AEHF-6
april Falcon 9 Starlink
april Minotaur IV NROL-129
29 Falcon 9 GPS-III-3

I expect the scheduled March 30 Falcon 9 SAOCOM-1B launch to be deferred.

>>11481690
The Case for Mars, page 126 for the physical copy. It's in chapter 5

>>11481678
I love zubrin, shame his politics are trash.

>>11481678
Sounds about right for nasa, maybe even 20% of a g solves all zero g issues but we would never know relying on nasa

Just a buncha bureaucrats doing makework

>>11481710
Don’t forget the paper work

The weebs have come

>>11481790
Dating sim when?

Reminder that weebs are disgusting and fat and unhappy virgins

>>11481848
And bless every one of 'em.

>>11481790
nice

>>11481709
There's nothing in orbit. Orbit is nowhere useful.

>>11481848
Wrong.

>>11481999
do you have any more rocket gijinka

>>11482003

>>11482007
Best one yet

>>11482003

>>11482007
Absolutely adorable.

>>11482014
7ft shiny amazon Starship girl when

>>11482014
When's Starship Super Heavy
the only orbital rocket where it having two girls would make sense

PS: Al Worden decided to sign off today before things turn really bad for geriatrics. RIP
https://www.youtube.com/watch?v=xhLkDOEPWzA

>>11482082
shame about the stamps

>>11482087
They did nothing wrong

>>11482082

First of only three deep space EVAs, deserves to be talked about more. I wonder how the Earth and Moon looked to him (them, generally) while they were outside, only one left with living memory of this is Mattingly.

The surviving Apollo astronauts are all 80+ celebrities. Be afraid. Be very afraid.

>>11482095
this but unironically

HULLO
https://www.youtube.com/watch?v=rmrSx2OuO84

>>11482107
>The surviving Apollo astronauts are all 80+ celebrities. Be afraid. Be very afraid.
But not big enough celebrities to get the full child blood transfusion regimen and be doing jumping jacks with 3 days like Tom Hanks. In fact, the millennial doctors treating these guys (God forbid) will probably say "OK, boomer" when told their patient went to the moon.

>>11481709
It's nowhere if you don't put anything valuable there, like big telescopes or round-the-clock operating habitats, it's nowhere if you don't use it for anything.

>>11482160
Even engine fails can't stop SpaceX

>>11480402
Crazy how nature made that

>>11482023
Starship would be a fucking T-X terminator with not coating at this point

>>11482380
. . . can it be a girl Terminator?

>>11481855
Happy Hayabusa is happy she gets to fulfill her purpose.

>>11482478
https://www.youtube.com/watch?v=oqmx_rE1Tz4

Forgot my video.

>>11480559
Could be hard to deliver the planes when cheap airlines are getting fucked right now.

>>11480402
>brrrrrrrraaaaaaapp

K I N O

>>11480559
>When the pandemic ends they will go back to selling planes and hopefully the 737 MAX will be allowed back into service shortly after, in turn alleviating all of their financial woes.
>Implying its not going to be at least a year until very small amounts of people even consider flying again
>Implying literally anyone will buy a 737 MAX after the fucking disaster shit show they have seen

Boing are fucked unless fed gov bail them out for years, they probably will though lmao.

>>11480497
Fuck this is dumb, along with the replies.
The original comment to was on the money, there's literally no greater energy density possible than matter-antimatter annihilation.
You are talking pseud shit about something we don't even understand.

>>11482409
Yeah.

>>11482881
>Implying literally anyone will buy a 737 MAX after the fucking disaster shit show they have seen

>The 737 MAX is the fastest-selling airplane in Boeing history with about 5,000 orders from more than 100 customers worldwide.

Demand definitely isn’t Boeing’s problem here, it’s getting the MAX flying and delivering them to customers ASAP to reduce the massive backlog.

>>11482881
>unless fed gov bail them out for years
They will.

>>11480763
>Soyuz-5
But where is Soyuz-3 and Soyuz-4?

>>11483038
Soyuz-3 definitely existed at a conceptual stage, not sure about Soyuz-4...

Reminder you need Boeing to fight china and russia.

>>11483068
>nk-33
Explains it.

>>11483105
The world needs the current Boeing like it needs the coronavirus.

At least MCAS isn't contagious.
But the do have one thing in common, right now neither one is airborne!

>>11483108
NK-33 powered Soyuz is actually a thing.

I want to build a Nuclear Thermal Rocket with a Commonwealth Fusion Systems tokamack as the reactor core!

>>11483197
fuck, that's a good looking texas heartstopper right there.

>>11480588
Why do you think the viability of starlink has changed?

>>11483238
it hasn't, and Starlink's primary customer is going to be the US military anyway

>>11483202
you ain't kiddin pardner

>>11483105
>Reminder you need Boeing to fight china and russia.
If there were a proper fight with either Boeing might be forced to stop being so completely rubbish at a. not wasting bazillions of dollars and b. not killing hundreds of people through incompetence and corporate cynicism

>>11480529
Boeing isnt going the chance, the engineer climate is gone, the CEO's and their lackey's in suits have completly destroyed that.
Boeing will get a massive bailout, the max will get a rebrand, and in a few years another skeletion will fall out of the closet and we will have another MCAS problem all over again.
Meanwhile airbus is laughing all the way to the bank.

>>11482344
nice

>>11483248
Not really, it will be general public. US military will have the preferred treatment for special needs, but the bulk of the services will be operated in the US which the US military doesnt need.

In spirit of the outbreak, How would a sealed colony would disease be prevented or contained?
Sealable clinic and hospital rooms may help but how do you prevent weakening immune systems and mutating pathogens in reduced gravity of Mars or moons?

>>11483854
the US Military wants to use it to bounce signals between ships and airplanes and ground troups in theatre

>>11483865
Simple, you don't let filthy earthniggers into your ubermensch disease free colony.

>>11482344
Based and checked.

>>11483871
The data usage cannot be compared. US military will only use <1% percentage of the bandwidth at best. Meanwhile 99% of the bandwidth will be used by general public.

>>11483895
the money is in contracts, not bandwidth

>>11483882
Disease is inevitable, Martian
Remember that

>>11483895
oh, but we're not comparing bandwidth
we're comparing dosh

>>11483895
>implying that the US military won't transfer terabytes of propaganda laden llama porn to spam at their enemies during a war

>>11483915
>implying that the US military won't transfer terabytes of propaganda laden llama porn for personal consumption

>>11483915
defeat your enemies by inundating them with high quality pornography so they don't have the testosterone for their survival instincts

>>11483924
And propaganda laden llama porn isn't high quality?

>>11483924
Isn't that what the jews are doing already? Remember when they attacked Palestine with that shit?
>inb4 some plebbit bugman tells me to go back to /pol/ lol

stack on stack on stack

>>11484093
it goes up

>>11483865
Vent them out.

>3 months into 2020
>SPACEX has lost two boosters already

Yikes

>>11484139
haven't lost any payloads, though. Maybe they're collecting insurance checks to funnel extra money into starship.

>>11484093
Was that lift platform just for people?

>>11482923
>there's literally no greater energy density possible than matter-antimatter annihilation.

In your ignorant ape opinion.

>>11483865
>In spirit of the outbreak, How would a sealed colony would disease be prevented or contained?

Open the airlock and kill them lol

>>11484148
yes

>>11482923
Dark matter annihilation is just as efficient as matter-antimatter annihilation except dark matter is free while you have to make antimatter yourself

>>11484248
except dark matter annihilation is purely theoretical and based in controversial science and matter-antimatter annihilation has been performed and tested.

>>11480780
"Rocket No. 5"

>>11484260
Uh huh, and if it's locked behind that energy barrier forever then you can forget about ever manufacturing more than a few anti-hydrogen atoms worth

>>11484272
You could manufacture quite a lot of antimatter over the course of a year using solar power on a space installation close to the sun.

>>11484266
Is alive?

>>11484172
>>11484148
The barriers look too shoddy to be permanent, maybe they'll make it into a sort of circular scaffolding that will go around the stack later

>>11484352
that's my hope as well

>>11481999
get a load of those FAIRINGS! unf

oh nooooooooo, not the heckin starlink competition
https://www.bloomberg.com/news/articles/2020-03-19/softbank-s-oneweb-is-said-to-mull-bankruptcy-as-cash-dwindles

>>11484383
Pour out one for Iridium 2.0, as predicted.

>>11483882
>earthniggers are immunized
>ubermenschen follow aztec and inca way on the slightest occasion

>>11483926
so yeah, that's in my search results now

>>11484383
heh, rip

>>11483148

View of the underside of a Soyuz 2.1v.

>>11484383
F

>>11484166
ahhh yes, the dark matter retard is right and annihilation doesn't have the theoretical maximum compared to literally everything else
keep digging that hole cockhead

>>11484272
>>11484310
Nearly all antimatter production on Earth isn't optimised for yield and is byproducts because storing it for longer than a few seconds is difficult and expensive.
In space you'd use it as soon as making it and don't need to bother with the messy business of storage.
Positrons are the simplest to generate but they have the same mass as electrons which is ~1800x less than a proton/antiproton, with an equivalent amount less thrust per particle. Still they are the best currently.
Currently the tech is immature and has plenty of potential for advancement as it's mainly an engineering rather than science problem now. It offers the best chance for constant acceleration spacetravel, nothing else simply has the energy density required for interstellar travel.
Even with small improvements in yield efficiency we get closer to a viable propulsion system where absurd amounts of deltaV can measured in kgs of noble gas fuel.
Plenty of challenges and not just with generation but it's an exciting field that's underfunded.

>>11484829
>it's an engineering problem not a science problem now
which means the science eggheads are all fucking bored of it and don't want to bother, and the engineers have no fucking clue what they're looking at so it's going to exist in this limbo forever now

>>11484383
This was expected. Their sats will cost 5-10x what SpaceX will cost.

>>11484383
LoL

>>11484413
Iridium already made a 2.0 (NEXT), OneWeb would be Iridium 3.0.
>>11480699
>the difficulty of working with dark matter
Do you know what the big difference is between antimatter and dark matter? We know that animatter is real. You can't "work with" dark matter because we haven't found any.

>>11484880
That's what I was saying but apparently you guys need everything spelled out. If something is theorized to be intangible, wouldn't it be hard to work with?

>>11484383
lol, when Shotwell said that "OneWeb's investors will be disappointed soon" she wasn't just shit talking...

>Happening: WH rules out bailout for Boeing
Happening: WH rules out bailout for Boeing
>Happening: WH rules out bailout for Boeing
Happening: WH rules out bailout for Boeing
>Happening: WH rules out bailout for Boeing
Happening: WH rules out bailout for Boeing

>>11484970
OOF

>>11484970
Good on nikki halley to resign

>>11484970
Literal fake news. Stop trying to pass off your wishful thinking as news, the White House is still negotiating what the conditions of the bailout will be. The US government will not cede the commercial aviation market to Europe and China, this along with Boeing’s defense contractor status makes it too big to fail. Stop deluding yourself.

>>11484985
The whole reason she did, is because one of the conditions of the bailout will be that the WH get to clear house and pick the board members.

>>11484998
Yep, here’s some actual news about the situation...

>>11484970
source?

>>11484988
Boeing is finished regardless. Even with the bailout it will be a husk of its former self.

>>11485021
Not if they can find good leadership to whip them into shape.
hahaha jk

>>11485013
There isn’t one...

>>11485021
>Even with the bailout it will be a husk of its former self.

Huh? Many already consider it that, a federally-mandated boardroom cleaning, combined with the 737 MAX re-entering service over the Summer could give them a big boost.

FUCK

BOEING

>>11485031
>737 MAX re-entering service

Pretty sure cunts are going to be cancelling orders left right and centre soon seeing as how airlines are getting gassed worldwide and for the foreseeable future will remain so.

>>11485021
>Boeing is finished regardless

Muskrat worshipper cope. Boeing is great.

>>11485038
>Pretty sure cunts are going to be cancelling orders left right and centre soon

5,000 orders is a lot to cancel. Also, the 737 is a primarily domestic/regional jet, meaning it’s not effected by travel bans as badly as wide body aircraft.

>>11485044
Not really, but definitely not finished.

>>11485047
Also, many airlines are currently cutting their old aircraft to safe money, there will be a dramatic uplift in orders when the pandemic ends because these aircraft will need to be replaced.

The Chinese sure do move on from their losses quickly...

>>11485066
Poor LM-7A, such a short mourning period...

>>11485071
The stubbiness and extreme length of the fairing makes for an interesting look

>>11484829
>In space you'd use it as soon as making it and don't need to bother with the messy business of storage.
What's the fucking point then if you still have to use something else to store energy

>>11485185
What are they putting up with this? That fairing is big.

>texas shutting down all restaurants, bars at midnight
california style lockdown will happen by the end of next week. spacex has one week to wrap things up.

>>11485196
>Boca Chica declares independence as a rehearsal of the future Martian empire under the rule of the great Elon

>>11485196
I don't see taco trucks included

>>11485196
>future civilizations find the husks of the prototypes and determine they were grain silos most likely used for ritual purposes

>>11485241
That's what I'm afraid of, that we are getting snuffed out right as we are on the cusp of becoming a real space faring civilization.

>>11485196
SpaceX is a major contractor of Air Force and Space Force, I doubt they will completely shut down for the reason.

>>11485256
and also NASA.

>>11485256
USAF doesn't have anything to do with Boca Chica operations. I could see them keeping Hawthorne and the Cape open, though.

>>11485222
>11481709
Currently in Texas, it's only eat-in restaurants that are forced to close. Drive-through and take-out is okay. Taco trucks are obviously take-out.

>>11485195
It's a telecom/SIGINT/early warning satellite. It features a 30+m unfoldable dish which is pretty long in the folded state. Besides, it's a GEO sat so it's large and packed with all sorts of stuff. I also suppose they are using Yuanzheng-1A in a GEO mission, which is a Russian-style robotic upper stage aka booster unit that fits under the fairing, making the stack even longer.

>>11485309
>booster unit that fits under the fairing, making the stack even longer.
Ah, that's what it is, makes sense.

when can we expect SN3 to undergo testing anyway?

>>11485333
With SpaceX, who can tell. It might be next week. We might not see any fire for 3 weeks.

>>11485196
SpaceX can stay open if they want to, and they do.

>>11484139
>crew dragon blew up
>falcon heavy center cores are cursed
>multiple falcon 9s failing to land again
>Merlin engine failing in flight
>all these starship tank explosions
>raptor died on hopper flight

>>11484248
>dark matter is free
Citation needed.

>>11484139
Easiest way to dispose of em

>>11485250
We‘re not getting wiped out. It‘s mostly culling boomers and messing with the stock market.

>>11485545
>All mission successfully
Seeingfags

>>11484383
Musk is responsible for this by sabotaging the competition through false over promises and public manipulation.
This is going to end up in court.

>>11485196
We'll get not-so-orbital SN3 ready and it will stay there as a monument of humanity's greatest attempt to get out of this bug infested rock until loving mummy nature destroys it as well.

>>11482014
>Space Shuttle is orbiter-chan riding piggy-back on ET-chan.
>SLS is ET-chan all grown-up.

>>11485195
>>11485309
>>11485329
No, the payload it’s designed to lift are the 20 ton modules of the planned Tianhe space station (pic-related). The 5B is a LEO-only variant, they removed the 5’s second-stage to boost it’s capacity to lower orbits but that makes it unable to send payloads to GTO. The payload it’s currently carrying for WDR is a mock-up of the aforementioned station module and the payload it’ll launch in April is a prototype crewed capsule.

>>11485928
Here’s a comparison between the 5 and 5B

>>11485928
Why does Soviet-derived hardware have such a unique style? It's unlike anything else in the space industry.

>>11485953
Soviets derived their spacecraft engineering from their shipbuilding industry, particularly submarines. The rest of the world leans on aircraft engineering for spacecraft.

>>11485955
Huh. That actually makes a lot of sense.

>>11485953
"Anything else" in manned spaceflight means US. It's not like there are many other manned space programs, there were only two original ones.

What do you mean by style? If you mean spherical forms, it's simple physics, a sphere is lighter than any other shape of the same volume. A spherical capsule is self-stabilizing at reentry, you don't need to point it the right side forward. Conic shapes also have their advantages, and have been chosen by Americans. Soviets also used them (ex. TKS). In the pic of the Chinese station above, the sphere is the main berthing node, just like ISS and Mir ones. It just makes physical sense to make it like this.

There's also another difference. Soviet-style station modules are autonomous spaceships which are launched in a traditional way on top of a rocket, and are capable of making their way to the station on their own. American modules are passive habitats which were delivered by Shuttle.

If you mean their habitat internals and color choice, it's a work of Galina Balashova, an industrial designer who developed first interiors for Soviet spaceships and stations, trying to avoid bright/aggressive colors and reflective surfaces. Chinese didn't seem to inherit that.

>>11485955
(citation needed) and doesn't make any sense to me. NASA made its first stations from rocket stages, basically. Later ones were designed with pure simplicity in mind, not sharing any legacy with planes, rockets or anything else. Soviets used spheres in Vostok because it was optimal; spherical and close-to-spherical forms took roots in their engineering school. It doesn't have anything to do with submarines, aesthetics or any other legacy outside of spaceflight.

And soviet and american rocketry was originally under the patronage of different military forces - in USSR is was artillery early on, in US it was air force. There's even the difference in terminology - in Russia the launch is still called "firing" among aerospace professionals, for example.

>>11482344

>>11486035
>And soviet and american rocketry was originally under the patronage of different military forces - in USSR is was artillery early on, in US it was air force.

That's not quite true. While the USAF did end up consolidating the military aspects of the US space program under its grasp, in the early days it was anyone's game. Parts of NASA, for example, can trace their heritage to the US Army, which was responsible for funding the early development of the Saturn I as part of the Army Ballistic Missile Agency.

When NASA was formed, the Army was stripped of their team, which was transferred to NASA wholesale. Meanwhile, the US Air Force had a case of "not invented here" syndrome, and chose to pursue the Titan rocket instead of using the Saturn that the Army had been developing.

In short: The US did consolidate its space capabilities into two agencies (civillian:NASA and military:USAF), but only after they got freaked out by Sputnik. Prior to that the situation was very messy and a patchwork of agencies had all been independently pursuing access to space.

>>11480559
>When the pandemic ends they will go back to selling planes and hopefully the 737 MAX will be allowed back into service shortly after, in turn alleviating all of their financial woes.

such wishful thinking.

>>11485928
very nice
chinks no 1

>spacex approved by fcc for 1 million user terminals in the US
that's alot of anticipated customers. if it's about $50 a month to use starlink then that's $50 million a month of revenue, $600 million per year. though it will probably be higher since they'll have alot of government and business customers too.

>>11486303
do we know how often they have to replace satellites? Even if they have to replace the entire fleet every year, it's probably still just a tiny fraction of the upkeep costs of traditional infrastructure

>>11486303
Surely you have at least a mil ruralfags who are getting assfucked by a monopoly.

>>11486309
literally everyone in the US gets assfucked by ISP monopolies, rural or otherwise

>>11486307
we probably know but i dont know, i thought it was at least every five years though?

>>11486309
however many customers, spacex will probably generate several billion in revenue every year from the US alone

>>11484747
It's 100% efficient mass-to-energy conversion either way dummy, the advantage of dark matter is that you don't need to carry it along with you, so you aren't a slave to the rocket equation anymore.

Bye bye OneWeb

https://www.businessinsider.com/softbank-backed-satellite-startup-oneweb-is-at-risk-of-dying-2020-3?utmSource=twitter&utmContent=referral&utmTerm=topbar&referrer=twitter

>>11484829
Antimatter is not useful unless you're using it as your primary energy storage method

>>11486448
called it
that was Starlink's only real competitor, right?

>>11486455
Yeah, pretty much. Bezos is allegedly planning a constellation, but only to further extend AWS services, not as a public offering.

>>11481185
>NSWRs and OCGCNTPRs
Those being?

>>11486488
nuclear salt water reactors
basically it's the Chernobyl disaster as a propulsion system
OCGCNTPR
no idea, my best guess:
open cycle gas core nuclear thermal pulse rocket
which I think just means either Orion or Medusa

>>11486496
>>basically it's the Chernobyl disaster as a propulsion system
my sides

>>11486496
>basically it's the Chernobyl disaster as a propulsion system
Nah, that'd be a regular nuclear thermal engine (Chernobyl was a steam explosion caused by high reactor power)
NSWRs work by spraying a saturated solution of uranium or plutonium into a chamber, where it reaches super-criticality and promptly detonates, flashing from liquid water to 100 million degree plasma.

>>11486536
yes, that's what I said
the Chernobyl disaster had an active prompt-critical fission explosion element to it

>>11486539
Chernobyl built up enough neutron population reactivity in the absence of Xe-135 to start voiding, and since that design had a positive void coefficient the reactivity went even higher once the coolant water started boiling. In a few moments the excess neutrons from those voiding areas caused the entire reactor's power level to increase dramatically and instantly boil all of the water, blasting the lid off of the reactor core. Some moments later the zirconium structures withing the reactor were heated enough to melt, and reacted with the hot steam to produce a secondary metal-water explosion (similarly to how the alkaline metals explode in water, not a hydrogen explosion but a rapid coulombic explosion as charge builds up in the liquid metal surface layer and causes the droplets to rapidly increase their surface area and thus their rate of reaction).

So basically nah. Chernobyl isn't our first NSWR analog. In a NSWR the fuel goes from zero reactivity to nuclear-detonation rates of reactivity in milliseconds.

>>11486455
Just wait for the Chinese version of Starlink to come up.

>>11486449
This. It takes more energy to make the antimatter than it will give you back. The only advantage is if you can get good energy density out of it.

>>11486594
The thruster the other guy showed wasn't even antimatter powered, the energy came from fusion. The positrons were only there to catalyze the fusion process, all of the energy released came from D-D fusion events with some of the neutron flux being used to convert krypton isotopes.

>muh rockets
This is not science you faggots

>>11486668
okay

>>11486668
But it is rocket science.

SLS is essentially cancelled right?

>>11486712
it's a political zombie, but it cannot be stopped

>>11486712
No. It still seems to be moving forward, albeit slowly.

>>11486713
>but it cannot be stopped
Oh really?

>>11486712
no, but gateway is and probably the concept of any permanent structures on the surface of the moon

>>11486712
Literally the opposite, NASA recently ordered a block buy of 10 cores and the first is currently being tested (was up until yesterday).

big

>>11486822
what's going on here

>>11486576
There won't be any satellites left when that happens.

>>11486866
they're redoing the thruster packs on one of the landing barges
exactly what that entails is what everybody's trying to figure out

>>11486866
Well, it's the second incarnation of Just Read The Instructions. As to what exactly they're doing? No idea.

>>11486870
What do you mean?

>>11486893
The Chinese version of Starlink will end up crashing into other sats and starting a debris cascade.

>>11486906
i dont think chinks ever had issues with that
you are free to correct me

>>11486984
They had that one anti-satellite missile test that left more junk than expected.

>OneWeb is die
>Boeing is crippled
>SLS even more of a zombie that it was before
>SpaceX luckily raised 500 mil just before shit hit the fan

based macarena virus

>>11486996
>be me
>fresh aero eng graduate
>with student loans
>cant find a job because every employer is holding their breath for corona
>mrw
I just want to design and build spaceships.

>>11486987
> left more junk than expected
by whose standards?
usa has done the same but on a smaller satellite mind you.
only other country that did is india but they dont count because they shit on street and in space

>>11487006
>by whose standards?
I might be mixing it up with the Indian test, but I recall that there was an international freak out over the Chinese test.

>>11487005
just be like me and decide to do 1.5 years of grad school first to let the recession shitstorm pass by

>>11486878
Maybe they're trying to play arkanoid with the barge and the booster?

>>11487032
I already went to grad school though, and I don't have enough money to go back.

>>11486906
Debris cascade is a meme
Everything will fall from orbit within 5 years

>>11487103
doesn't mean it won't make spaceflight impossible for anyone on Earth for 5 years and a better estimate is more like 10 years

>>11487103
>Everything will fall from orbit within 5 years
Orbital decay from altitudes over a few hundred km can take hundreds if not thousands of years

>>11487158
Yes, but orbital velocities also get slower. Armored ships prowling the void when?

THEY'RE SUSPENDING THE GREEN RUN
https://twitter.com/JimBridenstine/status/1240792424789823491

>>11486303
1 million may even be a low estimate. 20% of US population lives in rural area. That's ~60 million people. The current sat users only have a low 1.8M total is due to shit speed, bandwidth restrictions, exorbitant prices, high latency, etc. If SpaceX solves all of these, and they are on track, then they'll gobble up huge chunks.

>>11487207
In b4 that temporarily becomes indefinitely due to "muh economy".
God fucking damn it.

>>11487207
You can’t blame them, somebody working at Stennis tested positive for the virus. Physical work on the core-stage maybe suspended, but the test readiness review is being conducted virtually. The Boeing folks are really pissed right now, they’d just finished all the prep work on the CS and were planning to turn the avionics on next week, but that’s been postponed now. Boeing wanted to continue work after the case was discovered but NASA overruled them and gave the stop order.

>>11485928

Reminds me of that room where Unit 00 goes berserk.

>>11487224
That makes no sense considering SLS is a government project, I wonder how many NewSpace companies are gonna go under in the coming months, considering people will be less willing to flippantly pump money into startups.

>>11480414
third post bestest post

>>11485955

A strange historical development for an historical land power, as opposed to sea power (Britain). Consider also that their system depends on a literal landing, whereas the Americans' mission end was more nautical, with a splashdown.

>>11487229
>That makes no sense
The government is going to have its hands full stimulating corporations for years to come. It's not just a matter of "lel just print more money".

>>11487226
>Physical work on the core-stage maybe suspended, but the test readiness review is being conducted virtually
Sure. And then all of a sudden, more virtual tests and paperwork would be needed because the last set was done with a smaller crew and thus invalid for the full crew. You know, just to make sure everything is more "safe", spare no expense.

>>11487243
Someone on NSF argued that a short stoppage of physical work would actually be beneficial for programs because people will be able to catch up on paperwork, which when left unfinished often delays NASA projects after the physical tests are complete.

>>11487113
No just means you gotta clear a launch slot

>>11487255
Let's be real here: it's still gonna cause a delay.

>>11484383
Didn't Russia build something like 20 Soyuz rockets to launch all those OneWeb satellites? What do they do with those rockets now?

what's that?
launching SLS?
we can't have that

>>11487331
You might be joking now, but nothing will be launching very shortly. California (where SpaceX are based) is under lockdown, Washington (where Blue Origin is based) is a viral epicentre, Brevard County (where KSC/CCAFS is located) has cases. ULA in Alabama are the least effected so far.

I hope your wrong. I've waited long enough for Starship flight tests.

>>11487358

I asked whether this would happen about two weeks ago, and people pooh-poohed it at the time.

>>/sci/thread/S11440874#p11443049

>>11487503
The big upcoming moment is when KSC gets a case, joining Stennis, MAF and Ames at level 4. Do NASA send home all non maintenance and security personnel? In turn preventing Perseverance from launching (missing the window and delaying it by 2 years) and commercial crew from launching. Or not?

>>11487358
It will be interesting to see if Russia, China and India keep launching stuff. The next batch of Oneweb satellites is supposed to launch tomorrow from Baikonur.

>>11487262
Should change it to "boing" instead of boeing.

>>11487629
>It will be interesting to see if Russia, China and India keep launching stuff.

Russia don’t seem to be that adversely effected (yet) and Baikonur is very isolated compared to US launch sites, China’s launch industry was seemingly disrupted relatively minimally by the outbreak and I expect them to carry on as normal, India have already postponed a launch due to CV.

>>11487629
Russia may be lying about their numbers. The accusation is that they're listing those who have or die from coronavirus as regular flu deaths.

>>11487629
Russia are planning to launch a crew to the ISS in April

>>11487564

I believe they do whatever is necessary/make the tough call. When I wrote the earlier post, I specifically had in mind the decision to pull Ken Mattingly on the mere chance of exposure to Rubella. Astronauts and ground crew are two different animals but they depend on each other, and both need to be thinking straight. I was very loopy with this shit 24 hours ago and though I feel good at the moment, we're not done yet.

>>11487710
>Baikonur is very isolated
it's a space launch site, people come and go all the time there

>>11487714
what the accusation is backed with, besides the regular "muh russia" autism?

>>11485928
Why do they need these balconies for? There's no way to get there, it seems.

>>11487775
>what the accusation is backed with, besides the regular "muh russia" autism?
What's happening in the rest of Europe.
Their numbers are too low if we assume the virus spreads following the same pattern that it is elsewhere.

>>11487784
AFAIK they acted relatively early though, closing their borders with affected areas and taking early measures. Not to say they handled it well or better than some, but if you don't see something written in English on the net, it doesn't mean nothing is happening or somebody is covering up something
besides, there doesn't seem to be a surge in flu deaths, the seasonal flu epidemic seems to have dwindled
>if we assume the virus spreads following the same pattern that it is elsewhere
that's a pretty big assumption, if you look at taiwan for example, or any other country with the previous epidemic experience
there's no common pattern outside of some bubble really

>>11486141

While I don't know all the history that you do, I do know a fair bit about the X-15 program, and it's worth nothing that that was a thoroughly integrated joint program-both agencies participated, and ran the thing together.

>>11487810
They closed their borders with China, and to Chinese nationals relatively early.
But Russia has very good relations with Italy. Frequent travel between the nations.

Taiwan looks to be an outlier.
But you're right, I could be wrong. The rumours could be just that - rumours.

>>11486684

I couldn't tell if that was an S-II, I thought the 5xJ-2 config was bigger relative to the body than that. I guess there had to be room for a big ole interstage ring.

>>11487824
J-2 has a very small nozzle for being a vacuum engine, it's not anywhere near optimized

>>11487824
Like what >>11487850 said, the J-2's nozzle didn't expand so much for an upper stage engine. My guess as to why is so that more could be fitted in the stage for the Nova rockets, but five was enough for the Saturn V.

>>11487896
>>11487850

An autistic fact I enjoy: the frustrum-shaped S-IVB aft interstage assembly was designed and built as part of the S-IVB. However, during mating and flight, it remained attached to the top of the S-II - there was plenty of clearance for the lone J-2. Something I was unclear on two years ago (I thought perhaps it also flew off as a separate part).

So, I reckon ten major parts, with separation (and docking/staging) events:

S-IC
Interstage
LES
S-II (with attached S-IVB aft interstage)
S-IVB (with integrated Instrument Unit)
SLA fairing
LMDS
LMAS
SM
CM

A new question I suddenly have: was the S-IVB Aft Interstage assembly delivered complete with the stage aboard the Super Guppy, or did they barge it/etc?

https://www.airspacemag.com/daily-planet/ultimate-space-telescope-would-use-sun-lens-180962499/

Thoughts

>>11487989
500 AU is a very fucking long way away

>>11487989
- getting to 500AU takes really long
- transmitting nontrivial amount of data across 500AU is science fiction
- retargeting this is impossible
- gravitational lensing is a really niche and artifact prone method itself, it's not a universal method

Can stargates ever be a legitimate thing for FTL?
>Build gate in solar system
>Send out spacecraft to nearest star system
>Arrives 80-100 years later and builds second end
>Humans now have instant access to new star system
>Rinse repeat until entire galaxy is conquered

>>11488056
no

>>11487989

Let's do it.

>>11488056
How

>>11488107
By turning it on idiot.

>>11487564
>will NASA miss a deadline?

Do you even have to ask?

>>11488084
gib moni

>>11488316

Completely change what NASA is doing for the next 80 years for maximum effectiveness across a wide range of domains.

will we see starship be stacked tomorrow? thinking of going

>>11488377
isolate yourself nigger
Do not infect anyone at Elon's scrap rocket emporium

>>11488400
you're stuck in a car all day tho?

>>11488377
Tfw 1240 miles away

>>11488400
I think I ate lunch four times today. isolation is taking its toll. Luckily doom wads are eternal

>>11488056
Only if we can figure out how to construct and stabilize wormholes, or there’s some other method we’re unaware of by which disparate regions of spacetime can be connected. It is currently beyond our expertise if it is possible, but the same could be said of flight.

>>11488009
> transmitting nontrivial amount of data across 500AU is science fiction

Active SETI disagrees.

>>11488479
>SETI
And just how many signals did they detect? 0 was it?

>>11488404
>isolation is taking its toll

>>11488525
>And just how many signals did they detect?

I said active SETI, dumbass. We’ve beamed large amounts of data into the interstellar void before.

>>11487305
I'm hearing rumbles that a 2 week delay could cascade out to three months of launch delays
>>11487005
Coronavirus isn't stopping you from getting a job.
>>11486712
Likely opposite of cancelled. Will hear more at national space council meeting on Tuesday.
>>11486448
History repeats itself? Virtually every commercial comms system have bankrupted their parent company and been sold for pennies on the dollar. I don't really see anything unique about what SpaceX is doing to change this paradigm.

>>11487707
here

>>11488578
>Coronavirus isn't stopping you from getting a job

The job listings in my local area have been gassed by an easy 80-90 percent

>>11488578
>I don't really see anything unique about what SpaceX is doing to change this paradigm
>cheap disposable satellites launched for cheap
>(supposedly) cheap terminals and enough network capacity to not be a complete meme available only to select few

>https://techcrunch.com/2020/03/20/oneweb-confirms-layoffs-and-potential-launch-schedule-delays-amid-reported-bankruptcy-considerations/
OneWeb lays off 10% of workforce admist their bankruptcy filing.

>>11488616
10/10

>>11488056
Closest thing that can be done with existing technology would be a "laser highway", essentially you spend hundreds of years establishing multiple stations which use powerful lasers to accelerate a laser sail ship up to fractional C.

>>11488913
So who's gonna buy OneWeb? Bezos? Apple? Iridium?

>>11488056
>Humans now have instant access to new star system
lol

>>11480414
tpbp

>>11480497
Even if that worked, that's probably hundreds or possibly thousands of years off.

>>11481007
That's because they only think about engines that can be launched from the ground, they never take into account construction in orbital shipyards, and they certainly never take into account manned missions to the outer planets.

>>11481732
isn't he a neocon

>>11481932
Orbit is only good if you're using it to build shit, like shipyards, optical fiber factories...

>>11487215
A lot of so called "urban areas" are rural parts of metropolitan areas, so expect even more

>>11489221
honestly the only two people on Earth for whom it's a viable business venture are the richest man on Earth and one who already owns the cheapest orbital launch company on the planet. It doesn't make sense for anyone else.

new
>>11489376

>>11480407

I disagree

>>11484673

For how much longer will the Russians continue to manufacture these? Are there any publicly-known Russian plans to switch to a reusable design? How will disposable Soyuz towers compete with reusables?