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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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The Angara rocket family is a family of space-launch vehicles in development by Russia.
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Questions regarding the use of living organisms from kingdom Animalia for space exploration.
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Questions about the Antares launcher, built by Orbital Sciences.
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Questions about devices which collect and couple electromagnetic signals (communications, radar or other electromagnetic measurements) directly between free space, and conductors (e.g. waveguides or o…
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Questions regarding the use of antimatter, typically as a fuel for speculative high-performance engines.
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Weapons and activities whose purpose is to incapacitate or destroy satellites normally for military purposes.
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An application programming interface (API) is a connection between computers or between computer programs. It is a type of software interface, offering a service to other pieces of software. (from Wik…
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Apollo 11 landed the first humans, Neil Armstrong and Buzz Aldrin, on the surface of the Moon on July 20, 1969.
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Apollo 12 was the second Moon-landing mission in NASA's Apollo program, and the program's sixth manned mission. It launched on November 14, 1969, had two lunar EVAs on November 19 and 20, and landed o…
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Questions regarding Apollo 13 which is launched as a part of American Apollo space program by Saturn v from Kennedy Space Center in April 11, 1970 carrying three crew members but lunar landing was abo…
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NASA's Apollo program was a 17-mission program that focused on landing a human on the lunar surface. The program was the third human spaceflight by NASA, after Mercury and Gemini.
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Questions regarding the Apollo-Soyuz Test Program, a joint effort between Russia and the United States.
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A rocket designed for the Constellation program, which was cancelled in 2010. It was a LH2/LOX system with 2 SRBs, with a planned capacity of 188 metric tons to LEO.
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Questions about the ESA launch Ariane. There were multiple versions, with Ariane 5 being active currently.
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Launched on Nov 16, 2022 on the maiden flight of the Space Launch System, Artemis 1 was the first mission of the Artemis Program, which aims to land humans on the Moon. This mission orbited an unmanne…
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NASA's manned lunar program authorized by Space Policy Directive 1 in December 2017 with the goal of landing the first woman and the next man on the Moon and the first person on the Moon's far side (o…
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Artificial gravity is the varying (increase or decrease) of apparent gravity via artificial means, particularly in space, but also on Earth.
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Questions about objects in orbit which are human made, such as communications and GPS satellites, orbital observatories and space stations, and other man-made object in permanent or semi-permanent orb…
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