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 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 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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mainly composed of neutrons.
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Questions about reflecting telescopes using a concave primary mirror and a flat diagonal secondary mirror.
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Questions regarding the action or process of observing a single object carefully to glean information.
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Questions regarding structures designed to aid in the observation of astronomical objects.
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Questions regarding an object 'falling around' another object, due to a combination of gravity and momentum.
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A clockwork device that produces a small scale model of the orbits of objects in the solar system
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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.
Questions related to the unit of measurement, parsec, which is approximately 3.26 times the distance of a light year.
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Questions about photography of celestrial objects by amateur astronomers.
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Questions regarding celestial bodies in orbit around a star.
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Questions regarding the former 9th (now dwarf) planet Pluto.