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/sci/ - Science & Math

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11684922 No.11684922 [Reply] [Original]

Why is observable so big and we never see aliens? Discuss.

>> No.11684923

>>11684922
>observable so big
this

>> No.11684924

>>11684922
Life is likely rare. Alternatively, intelligent life is extremely rare.

>> No.11684934

>>11684922
There are well over dozen explanations ranging from “were the first life to evolve within a range we could observe it” to muh great filter to rare earth (which I personally subscribe to, since our solar system is seriously abnormal) to “we can’t recognize non carbon life” to interstellar travel being really really hard to literally, the universe is too big for us to have looked at a statistically significant portion.

>> No.11685009

>>11684922
Aliens don't real

>> No.11685070

Its a matter of being so big in space as well as so long in time.

>> No.11685122

>>11684934
legit question, how and why is it abnormal

>> No.11685194

>>11685122
The earth‘s and other rocky planets small size and position in the habitable zone. most similar planets are much bigger. Jupiter and saturn being in the same solar system as rocky bodies (jupiter has been posited to have kept a lot of asteroids from hitting earth, their existence and size is probably why the inner planets are small, and in systems with similar amounts of gas two stars often form) our moon, both in size and proximity (tides, protection from rocks, maybe plate tectonics) our sun seems to be unusually mild for a star of its type. the earths magnetosphere may be rare. the tectonic plates of earth may be rare and are probably important to life or at least very useful, and we don’t know why they actually exist and move on earth. our axial tilt is pretty conveniently angled and stable, seasons seem important for life. I think there are other things but i don’t recall them.

Depending on how you feel about the anthropomorphic principle, these may be important to the development of intelligent carbon based life.

This is all pure speculation of course as to how important some of these are to life.

>> No.11685204

>>11684934
>interstellar travel being really really hard to literally
This is what I think is most likely. The universe is teeming with life but there exists a hard limit on technology and scientific advancement that stops all intelligent life forms from ever advancing beyond a certain point, which is only a slightly more advanced than what we are now.

>> No.11685206

>>11685194
>This is all pure speculation

>> No.11685217

>>11685204
It wouldn’t even have to be that Hard or Close. Anything that makes interstellar travel hard -you have to literally create new life forms of machines specifically designed for 0 g/interstellar radiation/ etc, there’s no way to get around the hard c by folding space, such a solution is not practicable with a solar systems resources, etc - means a society could become incredibly advanced but live entirely in one system or one world. Hell, the physiological problem and the light speed problem seem pretty insurmountable.

>> No.11685219
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11685219

>>11684922
>Why is observable so big and we never see aliens?

Please describe how we would see aliens if there were some?

ProTip: There could be an alien civilization around Alpha Centauri, the closest star to us - and we would have no chance to detect it. We don't have any means to detect shit. We could literally still discover additional planets in our solar system.

>oops, this one was kinda far away from the sun, so it wasn't bright enough to see

That's literally where we are at technologically.

The only way we can determine whether there are planets around another sun, is by looking in regular dips in the sun's brightness. That's it. That's out ability to "see" out there. You retards seem to think we have Star Trek scanners.

>> No.11685224

>>11685206
>as to how important these are to life
Some of this seems pretty rare and uncommon. it’s impossible, however, to be certain of whether or not they are important for the evolution of life. We’ve found life on one planet on one solar system, how are we supposed to know what’s important beyond the obvious magnetosphere, water, sunlight, etc.

>> No.11685235

>>11684922
aliens are so far away they would appear very small

>> No.11685328
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11685328

>>11685219
/thread

>> No.11685340

>>11684922
because the G-man in the sky created us, all the rest of the universe is only dust

>> No.11685856
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11685856

200 light.year is not so far away...

>> No.11685877

>>11684922
Assuming they exist, we don't see them BECAUSE the universe is big.

>> No.11685898

>>11684922
Maybe there is some hidden attributes of the universe like there is only one planet with life in every observable zone.

This makes perfect sense why we don't see any aliens. The aliens might be in another observable zone but we're unobservable to them.

>> No.11685901

>>11684924
This seems to be the most likely answer. Why is this difficult for people to understand?

>> No.11685935

>>11685219
Alpha Centauri is only 5 ly away. We would definitely notice something.

>> No.11686001

>>11684922
Because aliens are really small retard.
>>11685935
>We would definitely notice something.
This is not true. Look up the calculations about the definition that a telescope can provide according to its size; I don't know them by memory. The result is that our best telescopes aren't able to clearly see something the size of a house at a distance of about mars. If there were some mud huts in mars we would see them so blurry that they'd seem rocks; you think we can see things that are 4.7303652 x 10^13 kilometers away? That's retarded, light is a cone; you can't see that far away without a telescope that is also a few billion kilometers wide. The only thing we can do is measure the properties of the light.

>> No.11686013

>>11685935
alpha centauri is a binary system that is very active. Any life that might have developed there would have been wiped out by the latest mass ejection.

>> No.11686480

>>11685935
>Alpha Centauri is only 5 ly away. We would definitely notice something.

What? What would we notice?

Radio signals? That's a fucking specific requirement to have.

Also: read this.
http://news.bbc.co.uk/2/hi/uk_news/magazine/7544915.stm

>Nasa's recent broadcast of Beatles music towards Polaris, the North Star, using a 210ft antenna and 20kW of power, would require any potential aliens to have an antenna seven miles across to be aware of it. To actually receive it as music, this would need to be increased to a 500-mile wide antenna. Polaris is 430 light years away.

430 light years away and a fucking directional singal (directional!) would need aliens sperging out about their version of the SETI meme hard enough to build 500-mile wide antennas.

430 light years is nothing.

>> No.11686505

>>11685856

nice pic, but ...
how many of these signals are strong enough to reach even the next star?

You think that TV and radio broadcasts are transmitted at a strength that is required to reach even the next stars?

>> No.11686512

>>11685935
>only

>> No.11686537

>>11684922
Because they'd probably be super far away and would have had to find a way to travel faster than the speed of light at that point which would let them time travel and make talking to pink retards that walk on two limbs seem kinda boring in comparison.