/sci/ - Science & Math

>>14860708
Less mass=less things. The less things there are in the object, the more the same propulsion device is able to accelerate that object because there are less things in it sucking up the energy from the propulsion device.

Ever kicked a cardboard box before? It goes pretty far. Now try kicking a 1980s refrigerator. It barely moves if at all. How hard you kicked those two objects was pretty much the same, what was different was the mass (and the friction but shhhh this is space it doesn't matter much here). A single small propeller will make an cargo frigate move 0.1mph at top speed. But that same propeller when installed on a common civilian motorboat will make it go 50mph.

>>14860801
Yes anon, more mass is still harder to move in space. You can "lift" a 1-ton elephant in space, but that doesn't mean you will make it move very fast when you push on it. It is still a bitch to do, just easier than on Earth's surface because any pushes you do against the space elephant compound more and more without any loss, whereas any push on the african elephant on ground level would be immediately offset by the friction of the ground and air the elephant is standing in.

For example, ion engines can't even lift themselves off the ground usually but they can be used to compound MASSIVE net gains in velocity because there is little fear of it dropping to the ground or having to push through air.

Once you visualize it everything makes sense, it just takes a while to get used to the fact that certain qualities of physics that are impossible to see easily on earth become super obvious in space where some variables have been removed. See: Dzhanibekov effect

Can anyone explain me this gif

>>12760306
All free floating objects in the universe bound by the power of gravity that spin at odd intervals and invert at some point. This is because this universe is ̶a̶c̶c̶o̶u̶s̶t̶i̶c̶ autistic.

https://youtu.be/afkFQEkmvJk

>>12737637

>>11866361
The climate would change with each flip. But no other planet or moon have been observed to flip either, so it most likely just doesn't happen.

could something like pic related ever happen to a planet?

if there's an oddly shaped iron core floating in the magma if our planet, could it flip like this?

>>9709588
The actual zero-g part only lasts 30 seconds in a plane

>>9709584
footage where there's no gravity

ITT: cool gifs not taken on ISS