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.

Launched in 2021, the James Webb Space Telescope (often called JWST) is a large, near infrared and visible space telescope with 18 mirror segments in Earth's L2 point. Use for questions about the tel…
Questions regarding the absence of significant gravitational force.
150 questions
Questions on the subject of missions to the Lunar surface - past, present, and future
148 questions
Topics that relate to orbit determination and flight path control. May also be used for navigation on the surface of celestial objects.
147 questions
Questions regarding the design or process of design of a spacecraft.
146 questions
Questions about orbits whose position in the sky remains the same for a stationary observer on the primary body.
139 questions
Questions about engines used in space that accelerate ions to create thrust.
139 questions
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…
Questions regarding effects on health by activities, prolonged stay, or exposure to environmental elements in space, celestial bodies, or space stations. Predominantly questions pertaining to health o…
135 questions
Questions about research and use of water in space environment
133 questions
Questions regarding the amount of money required to perform or sustain space exploration.
132 questions
Questions regarding visual impressions of objects or instruments used to capture visual impressions.
132 questions
Questions regarding the use of an object's gravity to change the velocity of a spaceship.
132 questions
SpaceX's second version of the Dragon spacecraft, also called "Crew Dragon". It is designed to carry humans.
132 questions
Questions regarding extremes or records, such as the smallest, largest, first, last, heaviest, etc. of a thing or event.
Questions regarding energy used to operate a mechanical or electrical device.
129 questions
Questions of the science and space exploration related to Earth.
127 questions
A telescope placed in space, typically for the purpose of avoiding atmospheric distortion, background light, and attenuation of light by the atmosphere.
126 questions
Questions regarding devices used to make a controlled descent and touchdown onto another object, usually either to transfer objects, or perform scientific observations.
124 questions
Questions regarding systems used to continually locate objects, often radar.
123 questions
Questions about the exploration of the planet Jupiter.
122 questions
The country of Russia is what remains of the former Soviet Union (Of which Russia was a province/state). The Russian/Soviet space program has been quite expansive and capable over many decades. Curr…
121 questions
the effect on a spacecraft of moving through atmosphere, how its density, pressure, temperature, flow velocity, and viscosity affect a craft, and how lift and drag can be used to modify that.
120 questions
Sensors, systems, strategies, algorithms and mathematics relating to BOTH determining AND controlling the attitude (3D orientation) of spacecraft.
120 questions
Questions regarding living organisms, searches for life, or human life in space.
119 questions
Questions about the procedure of using a piece of equipment to find imperfections or problems.
119 questions
Relating to treaties, laws, ownership and disputes during the exploration of space. For non-space exploration related law questions, see our sister site Law Stack Exchange.
117 questions
New Horizons is 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…
116 questions
Questions regarding computer programs used in space exploration.
115 questions
Questions regarding atmospheric drag which includes the resistance offerd by a moving object in fluid
115 questions
First or earliest instances of a notable event, implementation, or technological achievement related to spaceflight. Use the record tag instead for questions of the class fastest, smallest etc. as the…
Questions regarding the artificial creation of Earth-like conditions on another celestial body.
113 questions
questions about the observation of the planet Earth from space, usually for scientific, technical, or other well-defined reasons, or about the spacecraft that do this. This tag is usually used for sys…
111 questions
Force produced by pushing against a reaction mass in space à la Newton's third law: "For every action there is an equal and opposite reaction." The thrust of a rocket engine is the forward force produ…
111 questions
Questions regarding the study of life outside of Earth.
110 questions
Questions relating to the use of technology to further space exploration.
109 questions
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