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14 Cards in this Set
- Front
- Back
Big Bang Theory
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theory that states that the universe began with an explosion of a concentrated pinpoint of matter
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Closed Universe Theory
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theory that states that the universe will end with gravity pulling everything toward the center of the universe
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Open Universe Theory
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theory that states that the universe will continue to expand until the stars run out of fuel. Then, the universe will end in total darkness.
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Light-year
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the distance light travels in a year; it is a measurement of distance, NOT time
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Parsec
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another way to measure the universe; one parsec equals 3.26 light-years
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Parallax
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the apparent change in the position of a star based on background stars and two or more observations
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Quaser
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created first during the Big Bang, and therefore is the farthest away from the center of the universe
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3 pieces of evidence supporting the Big Bang
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1. Quasars- created first, they're on the rim of the universe
2. The universe is moving away from the center 3. Heat is evenly spread troughout the universe |
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Gravity's role in the Origin of the Universe
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Pushed all newly created matter out away from the center
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One light-year equals ____________ miles
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6 trillion
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Light travels 186,000 ________ per second
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miles
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The universe is how old?
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about 20 billion years old
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The Universe is going through a what shift?
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a red shift
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Two things that influence parallax
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1. Distance between sighting points
2. Distance between star and observer |