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Originally posted by Phage
reply to post by roughycannon
Star to star, galaxy to galaxy. Same principle. Same problems. Same problems as with gravity...but backwards.
There is no terminal velocity in space (except for the speed of light). Your antimatter spaceship is being repelled by the Sun's gravity remember? There is no need to escape it. The closer you are to the Sun the greater the acceleration away from it.
Also what would the terminal velocity be in the vacuum of space? would there even be one? would it not keep accelerating until it escaped our sun's gravity?
But how are you going to build your antimatter ship? A lot of matter in the Solar System. That becomes problematic when you're trying to make something out of antimatter. The solar wind is matter. It would eat up your ship as you build it, atom by atom. Messy and produces a lot of radiation at the same time.
But I think antimatter can be put to better use. If you can gather and contain enough antimatter to make the antigravity effect useful you can do a lot more with it than just using it to "fall" away from a gravity well. Make an engine. Mix a bit of matter with a bit of antimatter and you create enough energy to maintain acceleration for about as long as you want. That acceleration won't decrease according to the inverse square law as you leave the gravity well. You accelerate to the turnpoint, flip, and start slowing down.
edit on 4/30/2013 by Phage because: (no reason given)