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Astronomy quiz 3
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Spectroscopy
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10 Terms
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1
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What is absolute magnitude?
Absolute magnitude is how bright a star would be if it were at the standard distance of 10 parsecs.
2
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What is a light year?
A light year is the distance light travels in one year, about 5.88 trillion miles or 9.46 trillion kilometers.
3
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What is a parsec?
A parsec is an astronomical unit of measurement equal to 3.26 light-years or roughly 19 trillion miles.
4
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What is a white dwarf star?
A white dwarf is a dense, small star that remains after a low-mass star burns all its nuclear fuel.
5
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What is an extrasolar planet?
An exoplanet orbits a star outside our solar system.
6
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What is a transit in astronomy?
Transit in astronomy is when a celestial object passes between an observer and a larger body, like a planet passing in front of a star.
7
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What is a habitable zone?
A habitable zone is where liquid water can exist on a planet's surface due to favorable conditions around a star.
8
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What are star clusters?
Star clusters are groups of stars held by gravity and formed from the same molecular cloud.
9
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What is the interstellar medium?
Interstellar medium is matter and radiation in space between stars.
10
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What is the Local Group?
The Local Group is a group of galaxies that includes the Milky Way and about 54 other galaxies, most of which are dwarf galaxies.
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