Tour of the Universe Science Studies Weekly Earth-Space Science Week 7 – Flashcards
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an immense collection of trillions of stars just and gas
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galaxy
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pieces of rock or minerals that are flying through space
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meteor
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a meteor that falls to Earth
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meteorite
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a spiral galaxy, where we live
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Milky Way
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when atoms of lighter elements are forced to merge into heavier elements, mostly Hydrogen and Helium
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nuclear fusion
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a star that is just starting its life
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protostar
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a star at the end of its life
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red giant
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huge spheres of burning, glowing gas
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stars
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rocky planets
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terrestrial planets
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a large meteor that doesn't burn out and orbits the sun
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meteoroid
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a burning ball of space gas and dust that orbits the sun
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comet
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a very bright object that generates far more energy than a star
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quasar
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the unit astronomers use to measure distances in the universe
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light year
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huge areas of gas, a nursery for baby stars
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nebula
