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5 Cards in this Set
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rotation
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spin on an axis
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spins on?
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revolution
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the orbiting of one body around another
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the earth makes one ____ around the sun per year
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inclination
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Of an orbit, the angle of the plane of the orbit with respect to the ecliptic plane
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Summer Solstice/ Winter Solstice
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The point on the celestial sphere of northernmost or southernmost declination of the Sun in the course of a year; colloquially, the time when the Sun reaches that point
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Vernal and Autumnal Equinox
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An intersection of the ecliptic and the celestial equator. The center of the Sun is giometrically above and below the horizon for equal lengths of time on the two days of the year when the sun passes the equinoxes; if the Sun were a point and atmospheric refraction were absent, then day and night would be of equal length on those days.
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