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 regarding the brightness of an object.
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Questions regarding a family of extremely low-mass, electrically neutral particles described in the Standard Model of particle physics.
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Questions regarding structures designed to aid in the observation of astronomical objects.
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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.
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Questions regarding Uranus, the 7th planet from Earth's sun.
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Questions about volcanic processes and observations.
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Questions regarding atmospheric conditions on either Earth or on other planets.
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Questions about the "adulthood" of stars. The main sequence is a distinctive band of stars that appears in a color-magnitude plot (known as Hertzsprung-Russell diagram). Stars appear in the main seque…
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Questions about Titan, the largest moon of Saturn.
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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.
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Questions about the German astronomer famous for his three laws of planetary motion. Do not use this tag for questions about the Kepler spacecraft.
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Inclination defines the angle between the plane of the orbit of a planet or comet and another plane, usually that of the ecliptic.
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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 the large ring of rocky bodies between Mars and Jupiter.
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A measure of the ratio of an object's mass with its volume.
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any minor planet in the Solar System that orbits the Sun at a greater average distance (semi-major axis) than Neptune.
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Questions regarding the National Aeronautics and Space Administration, the American civilian space agency.
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Questions about quasi-stellar radio sources, active galactic nuclei that are far away and quite old.
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Questions about the apparent displacement of a celestial body with respect to its background when observed along two different lines of sight.
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Questions regarding the process of accurately finding your location, and getting to another place by planning and following a map.
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