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8 Cards in this Set
- Front
- Back
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Sidereal period
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The period of revolution of one body about another with respect to the stars.
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Synodic period
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how long it takes a planet to move on the celestial sphere and return to the same arrangement relative to the sun
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Sidereal day
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the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
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Solar day
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The period of time between the instant when the Sun is directly overhead (ie at noon) to the next time it is directly overhead
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Sidereal month
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Time required for the Moon to complete one trip around the celestial sphere (27.32 days)
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Synodic month
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Time required for the Moon to complete a full cycle of phases. (about 29.5 days)
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Sidereal year
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The time required for the constellations to complete once cycle around the sky and return to their starting points, as seen from a given point on Earth. (365.2564 mean solar days)
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Tropical year
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The time interval between one vernal equinox and the next. (365.2422 mean solar days)
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