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#9
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Scott Lowrey wrote: To get into orbit, your ship has to move at a speed high enough so that the Earth's gravity can't "catch it" and bring it back down. Gravity gets weaker as you get further away from a massive object like Earth, so the speed required to break away is called "escape velocity". It works out to about 7 miles per second (around 25,000 MPH) for a human-scale ship. Nope. If you get that fast, you won't go into orbit at all. What you have to do is get high enough and fast enough that your centrifugal pseudo-force balances Earth's gravity. That's less than escape velocity. George Patterson You can dress a hog in a tuxedo, but he still wants to roll in the mud. |
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