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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A collection of ionized gases and dust in interstellar space
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Questions regarding Neptune, the 8th and furthest major planet orbiting Earth's sun.
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Questions about Titan, the largest moon of Saturn.
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a planet that has a compact rocky surface like the Earth's; the four innermost planets in the solar system.
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Questions regarding Uranus, the 7th planet from Earth's sun.
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Questions regarding atmospheric conditions on either Earth or on other planets.
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Questions about the complete or partial blocking of the sun by the moon.
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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 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 about planets that do not orbit around a star. These planets travel through space.
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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 the Hubble space telescope, a scientific telescope on a satellite orbiting Earth.
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Questions about the simplest and most abundant element in the Universe.
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Questions about the gas that lays between stars in galaxies.
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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 patterns formed by group of prominent stars in the night sky.
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a relatively inexpensive Newtonian telescope, in which the tube assembly slips freely in the lower base.
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