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 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…
How heat affects spacecraft and space missions, or materials and methods to deal with heat.
Questions regarding the computers onboard spacecraft which handle mission-critical data.
devices that collect data (usually electromagnetic spectrum, visible or otherwise) to better resolve distant objects.
Questions about the stage(s) of a rocket after the first, used to establish an orbit, or a trajectory beyond Earth orbit.
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…
Space Launch System, the putative replacement for the Space Shuttle for future large missions.
Questions about solid fuels. The rockets that use them, the fuels that are burned, and the vendors that make them.
Questions related to protecting craft from their environment. Should be focused on the protection aspect and not the managing the effects of said environment.
Questions regarding scientific research, by means of the scientific method, into topics discussed. Investigative work based on empirical and measurable evidence that can be repeated, tried, and tested…
Questions relating to the JPL Horizons solar system data and ephemeris computation service
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…
Rather than carry empty weight all the way to orbit, rockets usually use a stage system. Stages can take many forms and have over the years.
Questions regarding how astronauts live in space, including day to day activities, chores, etc.
Questions relating to human physiology, as it affects capabilities in space.
Questions regarding NASA latest manned spacecraft program currently under development. Orion spacecraft will be used for missions beyond Earth orbit. For questions related to the Project Orion (propul…
Questions about the SpaceX produced Merlin-1D engine, used by the Falcon rocket.
Questions regarding the effects and conditions in a 'partial vacuum' or space with a gaseous pressure significantly smaller than atmospheric pressure.
Questions on a place or enclosure in which humans and/or other lifeforms live.
Questions related to structure, operations, missions, and facilities of the European Space Agency, an intergovernmental organization of 20 European states and Canada.
Questions regarding the steps and procedures taken prior and during the launch of a space vehicle.
Orbital maneuver during which two spacecraft arrive at the same orbit and approach to a very close distance. Rendezvous may or may not be followed by docking or berthing.
Questions regarding the application of chemistry in space exploration, for example the composition of rocket propellants.
Questions regarding use, design, storage, consumption, or other considerations of materials, propellants, systems, or biological samples stored and/or used under very low temperatures, often under lar…
Questions regarding the type of orbit in which the orbiting object stays in roughly the same location over Earth's surface.
Questions related to the growth or use of food on spacecraft or colonies. Also, any questions related to drinkable liquids either made or consumed in space.