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 chthonians, a hypothesised class of exoplanets that are the remnant cores of hot Jupiters.
Questions regarding Mars' smaller moon.
Questions about telescope attachments designed to block the direct light from a star.
Questions about CCD-sensors, i.e. light-sensitive electronic devices based on the internal photoelectric effect.
European space telescope for characterizing exoplanets
related to the astronomical unit (AU), the mean distance between the Sun and the Earth.
Questions about the Chandra X-ray Obseravatory, the NASA satellite for X-ray astronomy.
moving through space with unusually high velocity relative to the surrounding interstellar medium.
Questions regarding the hypothetical brown dwarf orbiting the Sun. It is theorized that this body periodically perturbs objects in the Oort Cloud, sending them toward the inner Solar System, causing m…
Questions regarding K2, the secondary mission for the Kepler Space Telescope.
for questions that involve an RC (Ritchey–Chrétien) type of telescope
Questions regarding the New General Catalogue.
Questions about the upcoming European Extremely Large Telescope.
Questions regarding non-baryonic matter, most notably, matter with negative mass or imaginary mass, such as tachyons.
Questions about gas-giant exoplanets with long orbital periods
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).