| Recent Answers from Kenneth Renshaw |
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2008-10-28 Where does it go?: Hi, Debra, thanks for writing. In the case of the shuttle, there are 3 parts to the "back end"-2 solid rocket boosters and the external fuel tank. The boosters have parachutes and land in the ocean,...
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2008-09-27 fuel: Hi, James, thanks for writing. The shuttle uses hydrogen in the external tank to feed the main engines, combining it with oxygen, and producing a clean exhaust, water steam. The solid rocket boosters...
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2008-09-15 How long does it take to travel between planets?: Hi, thanks for writing. Your figures are well in the ball park, except the Moon-Earth would probably be less than 3 days. Apollo made the trip in about 4 days, but New Horizons made the distance to the...
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2008-09-11 question: Hi, thanks for writing. Since the discovery of the cosmic background radiation (the leftover light from the bang), the big bang theory is pretty well the accepted theory, rather than the steady-state...
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2008-09-04 Leaving the atmosphere with helium help?: Hi! I am not sure where that altitude would be, and it would also depend on the weight taken on as well as the quantity of helium vs. the payload. Hydrogen would take it up higher, but the danger would...
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