earth-orbit escape
71Orbital speed — Not to be confused with Escape Velocity. The orbital speed of a body, generally a planet, a natural satellite, an artificial satellite, or a multiple star, is the speed at which it orbits around the barycenter of a system, usually around a more… …
72space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
73Constellation program — logo Constellation Program (abbreviated CxP) is a human spaceflight program within NASA, the space agency of the United States. The stated goals of the program were to gain significant experience in operating away from Earth s environment,… …
74Colonization of the Moon — Lunar outpost redirects here. For NASA s plan to construct an outpost between 2012 and 2024, see Lunar outpost (NASA). Moonbase redirects here. For other uses, see Moonbase (disambiguation). 1986 artist concept The colonization of the Moon is the …
75Non-rocket spacelaunch — Non rocket space launch (NRS) is a launch into space where some or all needed speed and altitude is provided by non rocket means, rather than simply using conventional chemical rockets from the ground. A number of alternatives to rockets have… …
76Apollo abort modes — During the launch of an Apollo spacecraft by the Saturn V rocket, the flight could be aborted to rescue the crew if the rocket failed catastrophically. Depending on how far into the flight the crew were, they would use different procedures or… …
77meteor and meteoroid — ▪ astronomy Introduction respectively, a glowing streak in the sky (meteor) and its cause, which is a relatively small stony or metallic natural object from space (meteoroid) that enters Earth s atmosphere and heats to incandescence. In modern… …
78Luna programme — The Luna programme (from the Russian word Luna meaning Moon ), occasionally called Lunik or Lunnik, was a series of robotic spacecraft missions sent to the Moon by the Soviet Union between 1959 and 1976. Fifteen were successful, each designed as… …
79Space gun — For other uses, see Space gun (disambiguation). The Quicklauncher spacegun A space gun is a method of launching an object into outer space using a large gun, or cannon. It provides a method of non rocket spacelaunch. In the HARP Project a U.S.… …
80Wernher von Braun — Von Braun at his desk at Marshall Space Flight Center in May 1964, with models of the Saturn rocket family Born March 23, 1912(1912 03 23) Wirsitz, German Empire …
