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The Water Cooler
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NASA Test Fires New RS-25 Engine
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<blockquote data-quote="Rod Snell" data-source="post: 2782270" data-attributes="member: 796"><p>The 500 # gorilla in going to Mars is the Sun's gravity, and getting to Mars in a matter of days would require more fuel and energy than anything we can now make. The path to Mars is a long gentle spiral between earth orbit and where mars will be at arrival time. Sort of like going up a winding road to get to the top of a mountain instead of trying to drive straight up a cliff.</p><p>The most efficient launch in theory would be in an orbit about halfway out to luna in a plane that would already have a lot of momentum in the right direction. Sort of like launching east from Canaveral for earth orbit to take advantage of the 1000 mph earth rotation speed.</p><p>So why don't we do that? Well, see any suitable space stations out there to fuel and service a space ship? Nope. </p><p></p><p>Orbital mechanics is a strange science where you learn that if you increase speed, you go up, and a straight line out of a gravity well requires incredible power.</p></blockquote><p></p>
[QUOTE="Rod Snell, post: 2782270, member: 796"] The 500 # gorilla in going to Mars is the Sun's gravity, and getting to Mars in a matter of days would require more fuel and energy than anything we can now make. The path to Mars is a long gentle spiral between earth orbit and where mars will be at arrival time. Sort of like going up a winding road to get to the top of a mountain instead of trying to drive straight up a cliff. The most efficient launch in theory would be in an orbit about halfway out to luna in a plane that would already have a lot of momentum in the right direction. Sort of like launching east from Canaveral for earth orbit to take advantage of the 1000 mph earth rotation speed. So why don't we do that? Well, see any suitable space stations out there to fuel and service a space ship? Nope. Orbital mechanics is a strange science where you learn that if you increase speed, you go up, and a straight line out of a gravity well requires incredible power. [/QUOTE]
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NASA Test Fires New RS-25 Engine
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