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Chapter page 1 Life On Other Planets
9 other sections not shown
aerodynamic altitude Apollo astronauts attitude control jets belts bi-elliptic transfer Big Shot booster burning cable camera capsule centrifugal chemical circular orbit combustion communication satellites craft detect downward dropped earth orbit earth's atmosphere Echo balloon ellipse energy engines equator explosion film flight flip fluid force fuel g-loads gases Gemini gravity losses heat hole hover hydrogen incredibly Isaac Newton launch vehicle liftoff liquid rockets lunar maneuver Martian mathematical meteorites miles per hour moon moon's motion multistage rocket Newton objects operation optimal oxidizer oxygen particles path payload photographs planets possible pounds pressure problem produced propellants proposed propulsion radiation radio reentry researchers retro rocket retro rocket shields rotation Saturn scientists shape shown in Figure simulate solar solar proton events solid rocket space spacecraft specific impulse speed stage stars surface synchronous tanks techniques telescope temperature theory Thor thrust thump tower trajectory Unfortunately upward velocity weight weightless