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.

Questions regarding the large "cloud" of small bodies that forms a sphere around the solar system.
36 questions
Questions about the outermost solid or liquid layer of a celestial body.
36 questions
Questions regarding matter in its gaseous state, and how it behaves in astronomy (e.g. forming stars in giant molecular clouds).
36 questions
Questions regarding the phenomena by which the ratio of the orbital periods of two (or more) bodies is a fraction of small integers, because of the gravitational interactions between them.
35 questions
for questions that are about the brightness of a celestial object as seen from 10 parsecs away.
35 questions
For questions about Hawking radiation, emitted by black holes and causing them to slowly evaporate. Use together with the [black-hole] tag.
35 questions
Questions regarding atmospheric conditions on either Earth or on other planets.
34 questions
Questions about infrared astronomy, both observations (in the broadest sense) and instruments. The infrared part of the electromagnetic spectrum has a longer wavelength than visible light, but shorter…
34 questions
Questions relating to the discovery of a new ninth planet (not Pluto) hypothesized in the Solar System.
34 questions
An event horizon is the notion of a distance away from the gravitational center of mass of a black hole. Observers outside of the event horizon can escape however any object including light which app…
33 questions
Questions about a depression on the surface of solid celestrial ojects, use also when asking about maar or caldera.
33 questions
Questions about Titan, the largest moon of Saturn.
33 questions
Questions about orbits with high eccentricities, which deviate greatly from perfect circles.
33 questions
compact rocky planets, in our solar system these would be Mercury, Venus, Earth & Mars
32 questions
Questions about red dwarfs, the smallest and most abundant stars in the universe.
32 questions
Questions regarding the second-shortest wavelength of light.
32 questions
Questions about a stepwise procedure to solve logical and/ or mathematical problems.
32 questions
Questions about is the electromagnetic radiation remnant from the early stage of the universe, also known as "relic radiation".
32 questions
Questions regarding stars that undergo changes in their spectra, temperature, or luminosity.
31 questions
for questions regarding the Hertzsprung-Russell diagram.
31 questions
Questions regarding a manmade object sent to explore space and celestial objects.
31 questions
Questions regarding a family of extremely low-mass, electrically neutral particles described in the Standard Model of particle physics.
31 questions
Questions regarding galaxies that host a compact, energetic core at the center characterized by non-stellar emission.
31 questions
Questions about large groups of stars bound together gravitationally. Use both for globular or open clusters.
31 questions
Questions regarding the space or objects outside of galaxies.
30 questions
Questions about the part of the electromagnetic spectrum with wave lengths longer than those of infrared radiation.
30 questions
Gamma ray bursts are flashes of gamma rays, produced by extremely powerful explosions in distant galaxies. They are among the most powerful events in the universe
30 questions
Questions about large, dense, massive collections of stars orbiting galaxies, thought to have formed in the early universe.
29 questions
Questions about the large ring of rocky bodies between Mars and Jupiter.
29 questions
Inclination defines the angle between the plane of the orbit of a planet or comet and another plane, usually that of the ecliptic.
29 questions
Questions regarding the movement of a celestial body's poles in relation to the stars in the night sky.
29 questions
Questions regarding a point in space-time where matter is infinitely dense.
29 questions
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