# What would happen if you jumped out of a moving spacecraft? [closed]

I've watched a film where one of the characters claimed to have rapidly disembarked a moving spacecraft during a 5g burn (?!) and immediately wondered how he survived.

For example, you're on a spacecraft that's travelling at 100mph (or any other random speed) and you go to the nearest airlock and jump out (I.E: leave the spacecraft).

Assuming you have a strong enough protective suit (I.E: this isn't a murder/suicide):

• What effect does this have on your body?
• Does the vacuum of space mitigate or exacerbate the negative effects?
• Will you just "float out" into space or will you actually be moving with/in the general direction of the spacecraft?
• Do you slow down or speed up relative to the spacecraft?
• How do the effects change as the speed changes?

I apologise for the multi-part question, but this question can't really be summarised in a single sentence.

UPDATE: Also, has this ever happened before? Has anyone ever "fallen out" of a spacecraft and made it back safely?

Thank you.

• What's the difference between jumping out of the airlock and walking out into a vacuum on a scheduled spacewalk? May 29, 2020 at 20:37
• There isn't any actual astronomy here, perhaps "physics" or "space exploration", I'd just note that space walks are routine from the space station, which is moving at about 7 km per second (ie a lot more than 100mph) relative to the Earth. Speed isn't a thing. It is only ever relative. The space station is motionless, relative to itself. May 29, 2020 at 21:56
• I'm sceptical. Walking around in a spaceship that's doing a 5 g burn isn't exactly easy. You have 5 times your normal weight, and then there's the added weight of your spacesuit to consider. Unless you're really fit, just standing up at a "mere" 3 g is very hard work, even without a spacesuit weighing you down. This New Scientist article says "Five to 10 seconds at 4 to 5 g vertically typically leads to tunnel vision and then loss of consciousness." May 29, 2020 at 22:48
• I’m voting to close this question because it is not about Astronomy. However, it might be on-topic in Space Exploration SE
– uhoh
May 30, 2020 at 5:28
• This has now been posted in Space SE: What would happen if you jumped out of a moving spacecraft?
– uhoh
May 31, 2020 at 1:59