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 the gas that lays between stars in galaxies.
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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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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 the process of assigning an identifying set of characters to an astronomical object.
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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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a relatively inexpensive Newtonian telescope, in which the tube assembly slips freely in the lower base.
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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 regarding the former 9th (now dwarf) planet Pluto.
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Questions regarding structures designed to aid in the observation of astronomical objects.
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