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 how planets develop layers of different material, with denser cores and less dense crusts.
Questions regarding the slow process of orbits getting smaller.
Questions regarding the change in properties of asteroids through some perturbation.
Questions regarding highly evolved, massive stars near the end of their life, with very high surface temperatures.
Questions regarding the process of stars losing mass through stellar wind, accretion by a companion, or other mechanism.
Questions regarding the hypothetical particle that is the quantum of gravity.
Questions about a hypothetical elementary particle postulated by the Peccei–Quinn theory in 1977 to resolve the strong CP problem in quantum chromodynamics (QCD).
Questions regarding the hypothetical far future in which dark energy increases, causing metric expansion at ever smaller scales. Seen as an alternative to the big crunch, or the heat death far future …
Questions regarding young protostars that undergo eruptions that change its magnitude and spectral type drastically. Also known as FUors.
Questions regarding 99942 Apophis, a large Aten-class Near Earth Object.
Questions regarding the irregular shaped, pockmarked moon of Saturn.
Questions involving websites that provide knowledge about heavenly bodies and other topics about astronomy and also serve as a knowledge sharing platform for astronomy students and astronomers. For ex…
Questions regarding computer applications related to astronomy.
Questions about objects that can be used as a physical distance indicator thanks to their known absolute magnitude.
Questions about stars whose atmosphere contain more carbon than oxygen.