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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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Autonomous spaceport drone ship (ASDS) is SpaceX mobile landing barge that serves as a landing platform for Falcon 9R first stage recovery after they boosted rocket's upper stage and spacecraft toward…
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Questions about asteroids, bodies in the solar system smaller then planets which orbit the sun.
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The Asteroid Belt is a region of space between the orbits of Mars and Jupiter where potentially millions of asteroids orbit.
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Questions about a now cancelled mission to retrieve a small asteroid and bring it back to a stable lunar orbit for future study.
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Questions regarding the study of life outside of Earth.
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The study of satellite orbits and space flight dynamics.
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Questions regarding how astronauts live in space, including day to day activities, chores, etc.
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Equipment that propels a suited astronaut during a spacewalk. Examples include the Manned Maneuvering Unit and SAFER.
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Questions regarding how astronauts are selected, and their required qualifications
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Questions regarding people present on spacecraft or space stations.
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The astronomical unit (symbol: au or AU) is a unit of length, roughly the distance from Earth to the Sun and equal to 149597870700 meters (by definition). (from Wikipedia)
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Questions more about celestial bodies themselves than exploration of them.
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A large family of space launch vehicles using LOX and RP-1 and possibly strap-on engines or SRBs, originally based on an ICBM design. The separate atlas-v tag should be used instead for questions abou…
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Atlas V is an expendable launch system in the Atlas rocket family.
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Questions regarding an envelope of gasses surrounding a celestial body held in place by the body's gravity.
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Questions regarding atmospheric drag which includes the resistance offerd by a moving object in fluid
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Questions on ascertaining, predicting, and controlling spatial orientation and rotation of spacecraft, and on forces that affect spatial orientation.
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Sensors, systems, strategies, algorithms and mathematics relating to BOTH determining AND controlling the attitude (3D orientation) of spacecraft.
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Avionics are the electronic systems used on aircraft, artificial satellites, and spacecraft.
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A launch complex in Kazakhstan administered by Russia. Operational since the 1950s, it has 10 separate launch pad areas, its own railroad, and two dedicated airports. Soyuz, Progress, Dnepr, and Zenit…
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