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 gravitationally bound systems of hundreds to thousands of galaxies as well as interactions between such systems.
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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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Questions regarding Albert Einstein's theory that posits, among other things, the equivalence of mass and energy.
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Questions about the observed frequency range of the electromagnetic radiation of a celestrial object.
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Stellar dynamics describe the branch of astronomy that studies the regularities in the motions of stars in gravitational fields of a stellar systems, as well as the evolution of stellar systems.
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Questions regarding an object orbiting around another object due to the force of gravity.
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Questions about Saturn, the 6th planet in Earth's solar system.
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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 material at or near the center of an astronomical object.
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Questions regarding the space or objects outside of galaxies.
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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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an object that orbits another object. In space, satellites may be made by man, or they may be natural. Most man-made satellites also orbit the Earth, but some orbit other planets, such …
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Questions regarding the large "cloud" of small bodies that forms a sphere around the solar system.
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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.