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I'm wondering how would you move without gravity? You would still have air pressure at 1Atm.

Would you "swim" in the air or would you have do something else?

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Larry Niven speculated at length on the possibilities in The Integral Trees and The Smoke Ring. Many other source in the SF literature have had some guesses to make. –  dmckee Apr 26 '11 at 16:59
    
Those books are so awesome. I don't care if a lot of the characterization and dialog are really cheesy; the world is just so cool. en.wikipedia.org/wiki/The_Integral_Trees –  Keenan Pepper Apr 26 '11 at 21:20
    
@Keenan: High Wow!-factor, and sometimes spotty characterization are par for the course with Niven. He does write really believable, human characters from time to time, but you can't count on it. I think it's the place he benefits most from collaboration. –  dmckee May 1 '11 at 23:40
    
Possible duplicates: physics.stackexchange.com/q/886/2451 and links therein. –  Qmechanic Aug 3 '13 at 20:16
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3 Answers

up vote 2 down vote accepted

The answer is: with great difficulty.

In a space ship there should be hand holds and footholds and a grid of ropes crisscrossing and you would move by pulling and pushing yourself: muscle power.

Air is too thin to get a reactive force to propel yourself effectively by swimming.

Once a motion is started, stopping will have to be taken into account too.

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Portable jet packs would be useful. –  Michael Luciuk Apr 26 '11 at 12:53
    
Without gravity, you'd jut need some sort of broad cloth to catch air. Or wings. Birds do just fine even with the Earth's gravity. –  Jerry Schirmer Apr 26 '11 at 14:24
    
@Jerry True, in a large enough space, wings would work, and training how to stop will be needed. –  anna v Apr 26 '11 at 15:02
    
Thanks for answering this question. So you could "swim" if you had wings but hand/foot holds seems the best idea. –  Ginger Bill Apr 27 '11 at 12:27
    
@Jerry why wings? How about a portable fan... I mean, you could be quite mobile with a fairly simple setup. –  AlanSE Aug 24 '11 at 21:24
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enter image description here

Well we could use arrangements springs and nets.

Example: Suppose you want to get from A to B. There is spring at A (launcher spring) and there is another spring at C(deflector spring). There is a net at B to catch you. And the big black rectangle is a house.

You firmly push your head against spring at A and let go. Once you reach spring C it will deflect you and at B the net will catch you. Please wear helmet!

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I would grow long nails on my hands and feet, and then run like a beast with the nails firmly in the soil at all times :) If I accidentally leave the surface, I would huff and puff in the reverse direction until I reach the surface again.

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Because Water (all of it!) would not stay in rivers/sea and soil once levitated from ground would "fly" around, we would have a lot such floating "things" around to grip and throw backwards. –  Georg Apr 26 '11 at 19:59
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