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.

Type to find tags:
× 9
Questions about the observed frequency range of the electromagnetic radiation of a celestrial object.
× 9 × 9 × 9
× 9
Questions regarding how bright an object appears to be.
× 9
an object that orbits another object. In space, satellites may be made by man, or they may be natural. Most man-made satellites also orbit the Earth, but some orbit other planets, such …
× 9
Questions regarding an event where the Earth goes between the Sun and the Moon and casts a shadow on the Moon.
× 9
Questions regarding undesired brightening of the night sky inhibiting observation of astronomical objects.
× 9
Questions related to earth processes or related processes and principles.
× 8
Questions regarding thermal energy and its effect on astronomical objects.
× 8
Questions regarding the inner portion of a galaxy; in the Milky Way, this is the area around Sagittarius A*.
× 8
Questions on any of the 5 locations where a small object can maintain a stable orbital configuration with respect to two co-orbiting larger bodies.
× 8
Questions regarding the space or objects outside of galaxies.
× 8
Questions about the simplest and most abundant element in the Universe.
× 8
Questions regarding grouping objects together based on one or more shared property.
× 8
Stellar dynamics describe the branch of astronomy that studies the regularities in the motions of stars in gravitational fields of a stellar systems, as well as the evolution of stellar systems.
× 8
Questions regarding the movement of an object at a given speed and direction, often related to the concepts of orbital velocity and escape velocity.
× 8
Questions regarding the theory of gravity as proposed by Newton, in which the force of gravity depends only on the mass of bodies, a constant, and the distance between them, and depends on one equatio…
× 7
Questions regarding Neptune, the 8th and furthest major planet orbiting Earth's sun.
× 7
Questions regarding a family of extremely low-mass, electrically neutral particles described in the Standard Model of particle physics.
× 7
Questions regarding the process of assigning an identifying set of characters to an astronomical object.
× 7 × 7
Questions about planets that do not orbit around a star. These planets travel through space.
× 7
Questions about the early phases of the star formation process. A protostar is a large mass of gas that results of the contraction of a molecular cloud.
× 7
Questions regarding Uranus, the 7th planet from Earth's sun.
× 7
a planet that has a compact rocky surface like the Earth's; the four innermost planets in the solar system.
× 7
Questions regarding an object orbiting around another object due to the force of gravity.
× 7
Questions regarding a manmade object sent to explore space and celestial objects.
× 7 × 7 × 7
Questions about the gas that lays between stars in galaxies.
× 7
a disk-shaped belt of icy debris orbiting in the outer solar system, lying beyond the orbit of Neptune and extending to a distance of about 50 astronomical units, containing thousan…
× 7 × 7 × 7
Questions regarding matter in its gaseous state, and how it behaves in astronomy (e.g. forming stars in giant molecular clouds).
× 6