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 pertaining to the launch vehicle developed by Wernher von Braun's team under Arthur Rudolph's supervision at Marshall Space Flight Center for carrying astronauts to the Moon. Saturn V (or C-…
Capsule for cargo and manned (eventually) payloads to orbit. Built by SpaceX, launched on a Falcon 9 rocket.
a series of communication antennas around the world used for communication with deep space spacecraft.
the varying (increase or decrease) of apparent gravity via artificial means, particularly in space, but also on Earth.
Questions regarding vertical rocket launch platforms and facilities in their immediate vicinity supporting final preparations for a rocket launch.
Variant of the SpaceX Falcon 9 rocket with reusable first and second stages using recovery systems demonstrated by the SpaceX Grasshopper and F9R-Dev1.
A telescope placed in space, typically for the purpose of avoiding atmospheric distortion, background light, and attenuation of light by the atmosphere.
Questions regarding space programs or services provided by private entities for the gain of money instead of governments.
Questions about a hypothetical transportation system between Earth and space that would not require large rockets to transport payloads.
Questions regarding transfer of data from spacecraft and probes
Questions regarding the amount of heat energy in an environment, as well as how to measure it.
Refers to questions concerning the solar system containing Earth. For other solar systems, use the 'planetary-system' tag.
Questions about the extraction of materials from other planets or asteroids.
Questions about life support systems in use on spacecraft, space stations, extraterrestrial colonies, or simulated extraterrestrial environments, about their function, design, effectiveness, historica…
use of space exploration or space-access technology for primarily artistic purposes
Questions on spacecraft propulsion techniques that are either theoretical or not yet at a high technology readiness level.
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…
SpaceX's second version of the Dragon spacecraft, also called "Crew Dragon". It is designed to carry humans.
The speed needed to "break free" of the gravitational attraction of a body without spending more propellant.
Questions regarding the building or style of building used to create a spacecraft.
Questions regarding astronomical bodies orbiting stars which are of proper size to be called planets.
Questions regarding exploration of the Pluto-Charon dwarf planetary system.
Questions regarding a 'sail' that can be attached to spacecraft to harness the sun's radiation to propel a ship in one direction or another.
Should be used whenever one specific online resource or printed book/tech.report/article is required. Care should be taken to avoid asking for broad, open-ended lists. It is better to ask for referenc…
Questions regarding the Sun, or Sol in Latin, the star at the center of the solar system Earth is in.
Questions regarding flyby in which the spacecraft flies near celestial object in a hyperbolic path for scientific explorations. Such flybies may also be made to increase velocity or reduce the velocit…
Questions regarding the process of bringing a mission to an early stop, often due to an emergency or unforeseen circumstances.
Can refer to both electrical devices and electrical power sources for said devices (batteries, generators, etc) on spacecraft or launch vehicles. Use in conjunction with a specific spacecraft or vehic…
Questions regarding the rocket engine nozzles, semi-open compartments of various shapes and sizes into which propellant components are injected by their own pressure or with a help of a turbine, often…
Set of values carefully prepared to be used together with a simplified perturbations model (most often SGP4) to predict satellite positions with a moderate level of accuracy for times near the epoch c…