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.
Questions about vehicles sent to extraterrestrial bodies, generally for use in data collection.
SpaceX's heavy lift launcher, based on the Falcon 9, using two strap-on boosters with a center core.
Questions regarding the reuse of parts or equipment.
Questions about debris in space, often in Earth orbit. Usually referring to nonoperational man-made satellites or parts of satellites.
Questions about impact of radiation on space exploration.
Questions about asteroids, bodies in the solar system smaller then planets which orbit the sun.
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.
Questions regarding travel on a cosmic scale, from one star to another.
Questions regarding the spacesuits that astronauts wear whilst in space
Questions regarding spacecraft designed to travel between planets.
Questions regarding the Soyuz manned spacecraft used by the Soviet and Russian space program.
Questions on obtaining electrical energy from the light of the Sun through either direct photovoltaic conversion or thermal conversion.
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…
Questions about satellites designed to aid in communications, such as phone, TV and Internet satellites.
Questions regarding words and abbreviations used in the fields of spaceflight and space exploration, and their meaning when used in those contexts.
Questions regarding missions or parts of missions which were not successful.
Questions on the subject of missions to the Lunar surface - past, present, and future
Questions regarding the absence of significant gravitational force.
the process of designing a spacecraft to fulfill a particular objective.
Questions explicitly involving numerical analysis.
Questions on launch complexes, spaceports or other locales for the launch of spacecraft.
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…
Questions pertaining to materials used for construction of space-worthy objects.
Questions regarding the second planet from the Sun.
Questions regarding rocket propellant in liquid form, the main type used for chemical rockets.
Using radio wavelengths to communicate between multiple spacecraft or between a spacecraft and the Earth.
Questions about orbits whose position in the sky remains the same for a stationary observer on the primary body.
a set of parameters that uniquely identify a specific orbit.
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, …
Topics that relate to orbit determination and flight path control. May also be used for navigation on the surface of celestial objects.
Questions regarding space exploration safety issues and procedures.
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…
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 the use of an object's gravity to change the velocity of a spaceship.
"change in velocity". The quantity has utility in rocketry as measure of the change in velocity that a reaction engine must produce to move into a given trajectory. The rocket equ…
Questions regarding extra-vehicular activity, or EVA, during space exploration.