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 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…
Questions regarding equipment or other material to be transported during space exploration.
Questions about Indian Space Research Organization (ISRO), its missions, research projects, and other activities financed, organized, planned, managed, or otherwise arranged under this organization's …
Questions regarding observation of spacecraft or phenomenon in space
Capsule for cargo and manned (eventually) payloads to orbit. Built by SpaceX, launched on a Falcon 9 rocket.
Questions regarding vertical rocket launch platforms and facilities in their immediate vicinity supporting final preparations for a rocket launch.
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.
the varying (increase or decrease) of apparent gravity via artificial means, particularly in space, but also on Earth.
Questions about a hypothetical transportation system between Earth and space that would not require large rockets to transport payloads.
Questions regarding space programs or services provided by private entities for the gain of money instead of governments.
use of space exploration or space-access technology for primarily artistic purposes
Variant of the SpaceX Falcon 9 rocket with reusable first and second stages using recovery systems demonstrated by the SpaceX Grasshopper and F9R-Dev1.
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…
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…
The speed needed to "break free" of the gravitational attraction of a body without spending more propellant.
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…
Questions on spacecraft propulsion techniques that are either theoretical or not yet at a high technology readiness level.
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…
Questions regarding the building or style of building used to create a spacecraft.
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.
Questions regarding the computers onboard spacecraft which handle mission-critical data.
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 exploration of the Pluto-Charon dwarf planetary system.
Questions regarding astronomical bodies orbiting stars which are of proper size to be called planets.
SpaceX's second version of the Dragon spacecraft, also called "Crew Dragon". It is designed to carry humans.
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…
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…