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:
× 6
× 2
× 2
× 49
Questions about the observation of celestrial objects by non-professional astronomers.
× 3
× 5
The corresponding particles of opposite charge to the particles of conventional matter (e.g. the positron is the antiparticle of the electron)
× 5 × 6
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 …
× 6
× 6 × 25
Questions regarding relatively small rocky bodies in an orbit around the Sun.
× 3 × 9
Questions related to techniques and equipment related to amateur to professional astronomical photography.
× 29
Questions involving the physics of the universe, especially the nature of astronomical objects, energy fields, and/or regions, rather than their positions or motions in space.
× 28
Questions regarding a layer of gasses surrounding a celestial object.
× 3
× 2
× 35
Questions regarding the currently prevalent cosmological model for the origin of the universe.
× 15
gravitationally linked and orbiting around their common center of mass.
× 6 × 79
Questions regarding points of extremely high mass density, which creates an extremely strong gravitational field from which light cannot escape.
Questions regarding Callisto, an icy moon of Jupiter.
× 2