Tags
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.
An ephemeris provides a means for quickly estimating the positions, and sometimes orientations, of solar system bodies as a function of time.
61 questions
Questions about the SpaceX produced Merlin-1D engine, used by the Falcon rocket.
60 questions
Resultant reaction mass, usually a gas or plasma, released from a rocket or thruster, including chemical, cold gass, ion and other types of engines.
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Questions about equipment used to gather information during space exploration.
59 questions
Questions regarding Apollo 13 which is launched as a part of American Apollo space program by Saturn v from Kennedy Space Center in April 11, 1970 carrying three crew members but lunar landing was abo…
59 questions
questions about how visible spacecraft are, as seen from Earth or anywhere else, as seen by eye or by imaging systems.
59 questions
Refers to retrieving spacecraft or related equipment instead of simply expending it. Use with the related equipment tag(s) (i.e. [rockets]).
58 questions
Questions regarding torque generation and momentum storage by the means of rotating wheels
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Questions more about celestial bodies themselves than exploration of them.
57 questions
In situ resource utilization aims to exploit materials found in the lithosphere and atmosphere of planetary bodies for life support, propulsion, and other functions of interplanetary missions.
57 questions
Questions related to the Cassini–Huygens spacecraft sent to Saturn.
57 questions
The burning process, especially of propellants, or as it otherwise relates to spacecraft or missions in space.
57 questions
Questions about cosmic rays and cosmic background radiation.
56 questions
Questions regarding the type of orbit in which the orbiting object stays in roughly the same location over Earth's surface.
56 questions
Question regarding inflatable spheres filled with material lighter than the surrounding material used to lift objects, and their uses in space exploration.
56 questions
Questions regarding acceleration - the rate and/or direction by which an object's speed or velocity vector changes with respect to time.
56 questions
Questions regarding spacecraft, projects, or agencies of or relating to the United States of America.
56 questions
LOX (liquid oxygen) is pure oxygen kept at a temperature at which oxygen is a liquid, between approximately 54.4 K and 90.2 K (corresponding to -219 °C to -183 °C, or -362 °F to -297 °F). LOX can be u…
55 questions
RTG is a Radio-isotope Thermo-electric Generator. It uses the heat generated by the decay of a radioactive material to generate power. Often the heat as well, to hold off the cold temperatures in sp…
55 questions
Radio detection and ranging devices. Operate by detecting and processing return echoes from objects and surfaces of signals at radio frequencies. Can be used to ascertain spatial coordinates and veloc…
55 questions
Questions about space flight activities without humans onboard.
55 questions
Questions concerning governmental regulation of activities in space and aerospace.
55 questions
The Hubble Space Telescope (HST) is a space telescope in low Earth orbit with a 2.4 meter main mirror capable of observing near ultraviolet, visible, and near infrared light. It was launched in 1990 …
55 questions
Questions regarding scientific procedures performed in space to test a hypothesis or make a discovery.
54 questions
Questions regarding the procedures in place to protect the area around a launch from damage in case of launch failure.
54 questions
Questions involving optical components, such as lenses, filters, and mirrors
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Questions on a place or enclosure in which humans and/or other lifeforms live.
54 questions
Questions regarding model and/or high-powered rocketry.
54 questions
A parachute is an object used to slow down objects. It's often found in either a round or rectangular shape. In regards to space travel it's often used to slow down capsules after re-entry allowing fo…
53 questions
Questions relating to human physiology, as it affects capabilities in space.
52 questions
Questions regarding small, clustered pieces of dirt/rock, and it's effect on space exploration.
52 questions
Questions about instruments to collect data from the environment.
52 questions
Ingenuity is the helicopter drone that flew to Mars on the Perseverance rover. Use for questions about the device itself. Use with the [perseverance] tag.
52 questions
Should be used for questions related to preventing collisions in orbit. This includes risk assesment, evasive manuevors, avoidance althorithims, and other safety measures.
51 questions
Questions regarding the distance of an object above a surface.
50 questions