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.

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Questions about Mercury, the first planet from Earth'd sun. Also the smallest major planet in the Solar System,
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Questions regarding an event where the Earth goes between the Sun and the Moon and casts a shadow on the Moon.
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Questions regarding undesired brightening of the night sky inhibiting observation of astronomical objects.
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Questions regarding specific terms, names, or naming conventions.
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Questions regarding an object orbiting around another object due to the force of gravity.
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Questions about patterns formed by group of prominent stars in the night sky.
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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.
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Questions related to earth processes or related processes and principles.
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Questions regarding the inner portion of a galaxy; in the Milky Way, this is the area around Sagittarius A*.
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Questions regarding the space or objects outside of galaxies.
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Questions regarding thermal energy and its effect on astronomical objects.
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Questions about the simplest and most abundant element in the Universe.
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Questions regarding how bright an object appears to be.
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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.
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Questions regarding the large-scale change of orbits over time, as in the Nice Model.
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Questions regarding Neptune, the 8th and furthest major planet orbiting Earth's sun.
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Questions regarding the process of assigning an identifying set of characters to an astronomical object.
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Questions about planets that do not orbit around a star. These planets travel through space.
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Questions regarding a manmade object sent to explore space and celestial objects.
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The corresponding particles of opposite charge to the particles of conventional matter (e.g. the positron is the antiparticle of the electron)
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Questions about orbits with high eccentricities, which deviate greatly from perfect circles.
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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…
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Questions regarding Uranus, the 7th planet from Earth's sun.
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Questions about the gas that lays between stars in galaxies.
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Questions about the NASA space observatory famous for finding potentially habitable exoplanets. Do not use this tag for questions about Johannes Kepler.