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 relativistic theory of gravity. General relativity describes gravity as a geometrical property of space and time.
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Questions regarding the attractive force which exists between any two pieces of matter.
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Questions about the "Goldilocks Zone" around a parent star where conditions are just right for the potential of life developing.
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Questions regarding thermal energy and its effect on astronomical objects.
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Questions about gas-giant planets in very close orbit to their parent star (closer than Mercury).
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Questions regarding the Hubble space telescope, a scientific telescope on a satellite orbiting Earth.
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Questions regarding two objects colliding into each other with considerable force.
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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 regarding the space or objects outside of galaxies.
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Questions about the gas that lays between stars in galaxies.
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Questions regarding Jupiter, the 5th and largest planet in Earth's solar system.
Questions related to Kuiper Belt Objects that exist in an annulus from 30AU to approximately 50AU from the Earth's Sun.
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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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Late Heavy Bombardment; occurring between 3.7-4 billion years ago when the inner solar system underwent heavy asteroidal impacts. Also know as the Lunar Cataclysm.
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Questions regarding electromagnetic radiation in the visible spectrum.