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2014 Sun-Earth-Moon

Earth Science 2014

TermDefinition
Solar Eclipse Occurs when the moon passes between the Earth and the sun, casting its shadow on the Earth. Can occur only during a new moon.
Lunar Eclipse occurs when the Earth passes between the sun and moon, casting its shadow on the moon. Can occur only during a full moon
Orbit path of one object around another.
Revolution movement of one object around another
Solstice Occurs on the first day of summer (June 21/22) and the first day of winter (Dec. 21/22)
Equinox Occurs on the first day of spring (March 21/22)and the first day of fall (September 21/22) when the sun shines most directly at the equator creating periods of equal day and night.
Tropic of Capricorn 23.5 degrees south latitude. The number of degrees south of the equator upon which the suns rays shine most directly on the first day of winter in the northern hemisphere
Tropic of Cancer 23.5 degrees north latitude. The number of degrees north of the equator upon which the suns rays shine most directly on the first day of summer in the northern hemisphere
Ecliptic plane upon which the sun, planets and signs of the Zodiac are located.
Aphelion Point in the orbit of a planet when it is furthest from the sun. For the Earth that occurs in July
Perihelion Point in the orbit of a planet when it is nearest the sun. For the Earth, that occurs in January
Ellipse geometric shape made by using two points. Unlike a circle made with one point
Eccentric irregular: not round
Geocentric Earth-centered solar system.
heliocentric Sun-centered solar system.
rotation spinning on an axis
Created by: jljohnson404