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.

Type to find tags:
Questions about patterns formed by group of prominent stars in the night sky.
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Questions regarding the material at or near the center of an astronomical object.
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Questions about the origin, history, evolution and fate of the Universe.
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a process of inspecting, cleaning, transforming, and modeling data with the goal of discovering useful information, suggesting conclusions, and supporting decision making.
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A measure of the ratio of an object's mass with its volume.
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Questions regarding the amount of space between two objects, the units, or measurement thereof.
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a relatively inexpensive Newtonian telescope, in which the tube assembly slips freely in the lower base.
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Questions regarding the universe shortly after it's formation
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Questions regarding the planet on which humans live and work, the third planet from the sun.
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Questions about solar system planets/moons and exoplanets that exhibit similar features to the Earth.
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Questions about Europa, a moon of Jupiter with a planet-wide ocean under a thick ice crust.
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Planets that lie outside our solar system.
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Questions about the increase with time of distance between two distant points in the Universe.
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about the lack of evidence for alien life, despite the growing evidence that suitable planets are reasonably plentiful.
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Questions about the dynamical processes leading to the assembling of a celestial object.
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Questions regarding systems of large numbers of stars held together by gravity.
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