Tags

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 patterns formed by group of prominent stars in the night sky.
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Questions regarding the cosmic microwave background, or CMB, the leftover radiation that is taken by many as proof of the Big Bang.
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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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Questions regarding interactions between galaxies or between major parts of a galaxy.
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Questions regarding an object orbiting around another object due to the force of gravity.
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Questions regarding telescopes in orbit around Earth, such as the Hubble Space Telescope.
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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 inducing chemistry, physics, and many more branches of science into astronomy.
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Questions about the apparent force stretching a body towards and away from the center of mass of another body due to the variance in acceleration due to gravity
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Questions regarding the motions of celestial objects.
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Questions about man-made objects orbiting astronomical objects.
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Questions regarding an event where the Earth goes between the Sun and the Moon and casts a shadow on the Moon.
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For questions about the various phases on the Moon as observed from the Earth, also known as waxing and waning.
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Questions regarding the emission of high energy particles or waves through a vacuum or a partice medium.
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Questions regarding the visible night sky during nighttime from Earth.
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Questions about computer programs that assist modeling and observing the dynamics of astronomy.
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Questions regarding the former 9th (now dwarf) planet Pluto.
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A collection of ionized gases and dust in interstellar space
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Questions about using the Python programming language to solve astronomical problems. General questions about Python are off-topic but might be asked on Stack Overflow.
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Questions regarding the bending of light by mass or energy.
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Questions regarding how bright an object appears to be.
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Questions about rings of debris that encircle the equatorial regions of some planets.
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Questions about the gas that lays between stars in galaxies.
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Questions about electron degenerate stellar remnants.
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Questions regarding the movement of an object at a given speed and direction, often related to the concepts of orbital velocity and escape velocity.
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Questions regarding neutron stars which emit regular pulses of electromagnetic radiation.
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Questions regarding the universe shortly after it's formation
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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 quasi-stellar radio sources, active galactic nuclei that are far away and quite old.
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Questions about Mercury, the first planet from Earth's sun. Also the smallest major planet in the Solar System.
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Questions regarding one of the three forms of space debris, this case a chunk of debris that survives its passage through the atmosphere and lands on a planet intact.
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For questions about transits of planets in front of the Sun, as seen from another, more distant planet; for example, the transits of Mercury and Venus which are visible from the Earth.
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Questions about the NASA space observatory famous for finding potentially habitable exoplanets. Do not use this tag for questions about Johannes Kepler.