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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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Questions about asteroids, bodies in the solar system smaller then planets which orbit the sun.
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Questions about vehicles sent to extraterrestrial bodies, generally for use in data collection.
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Questions regarding travel on a cosmic scale, from one star to another.
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Questions about impact of radiation on space exploration.
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How physics applies to a particular activity in space or to getting to space.
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Type of satellite in the shape of a cube 10 cm on each side. Popular with academics and amateurs with a focus on off-the-shelf components.
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Questions about debris in space, often in Earth orbit. Usually referring to nonoperational man-made satellites or parts of satellites.
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Questions regarding the Soyuz manned spacecraft used by the Soviet and Russian space program.
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Questions regarding spacecraft designed to travel between planets.
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a spacecraft capable of supporting a crew, which is designed to remain in space (most commonly in low Earth orbit) for an extended period of time. For questions…
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Questions on obtaining electrical energy from the light of the Sun through either direct photovoltaic conversion or thermal conversion.
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Questions about satellites designed to aid in communications, such as phone, TV and Internet satellites.
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the process of designing a spacecraft to fulfill a particular objective.
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Questions regarding the spacesuits that astronauts wear whilst in space
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Questions regarding the absence of significant gravitational force.
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an American scientific program that launched two unmanned space missions, the probes Voyager 1 and Voyager 2. Although they were designated officially to study just the planetar…
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Questions on launch complexes, spaceports or other locales for the launch of spacecraft.
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Questions regarding the second planet from the Sun.
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Questions regarding special words and abbreviations used in space exploration, and their meaning in that context.
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Questions pertaining to materials used for construction of space-worthy objects.
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a set of parameters that uniquely identify a specific orbit.
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Questions explicitly involving numerical analysis.
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Questions which ask for an object in a photograph or other media to be identified and/or have its function described.
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Topics that relate to orbit determination and flight path control. May also be used for navigation on the surface of celestial objects.
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Questions regarding visual impressions of objects or instruments used to capture visual impressions.
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Lagrangian points (also Lagrange points, L-points, or libration points) are the five positions (L1 - L5) surrounding two celestial bodies where gravitational pull of the two large mass bodies provides…
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Questions regarding rocket propellant in liquid form, the main type used for chemical rockets.
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Questions on the subject of missions to the Lunar surface - past, present, and future
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Questions regarding living organisms, searches for life, or human life in space.
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Using radio wavelengths to communicate between multiple spacecraft or between a spacecraft and the Earth.
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Questions about research and use of water in space environment
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NASA's space probe launched in early 2006 towards the dwarf planet Pluto as the first spacecraft to fly by and study this Kuiper Belt Object (KBO) and its moons, Charon, Nix, Hydra, Ke…
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Questions about deep space travel and observations that are related to the distance between the object in question and the Earth. For example, questions about communications delay, radial resolution, …
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Questions regarding space exploration safety issues and procedures.
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Questions regarding the use of an object's gravity to change the velocity of a spaceship.
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Questions about the exploration of the planet Jupiter.