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12 Cards in this Set
- Front
- Back
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astronamy
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Sedation and interpretation of celestial bodies and phenomenon
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geocentric
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Describe the concept of an Earth centered universe
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heliocentric
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Describes the view that the Sun is at the center of the solar system
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retrograde
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The apparent westward motion of the planets with respect to the stars
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ellipse
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an oval
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astronomical unit
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Average distance from earth to the sun 1.5 * 10 to the 8 hour or 150 million call mattersaverage distance from earth to the sun 1.5 * 10 to the 8 hour or 150 million call matters
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rotation
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The spinning of a body such as Earth about its axis
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revaloution
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The motion of one body about another as Earth about the Sun
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preccessiin
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A slow motion of Earth's axis. Traces of a cone over a period of 260 thousand years
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perihelion
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The point in the orbit of a planet earth it is closest to the Sun
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aphealion
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Replacing the orbit of a planet where the planet is farthest from the Sun
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perrigge
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The point at which the moon is closest to Earth
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