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Solving the Problems of Spaceflight
Linking Up in Space
The Mysteries of Earths Twin
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able actually Agena air lock Aldrin Apollo Apollo 11 Armstrong asteroid asteroid belt astronauts back to Earth began Belyayev booster rocket cameras carried chunks clouds Columbia command module cone craft crew Eagle Earth's atmosphere Explorer feet flight float fuel Gagarin Gemini giant go into orbit gravity huge human inside instrument compartment James McDivitt Jupiter Jupiter's Laika lander later launched Leonov Luna Luna 9 Martian metal ball miles an hour miles from Earth million miles Moon Moon's surface moving opening orbit parachute pilot Pioneer problems push put into orbit Ranger Red Planet return to Earth ring rock rocket engines round satellites Saturn Schirra scientists and technicians sent back showed Skylab Solar Soviet space programs Soviet Union space shuttle space stations space suit spacecraft spaceship sped speed Sputnik take pictures things tiny Titan U.S. Mariner Venera Venera 13 vessel Viking Voskhod Vostok Voyager wing