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27 Cards in this Set
- Front
- Back
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occurs when one object in space moves into the shadow cast by another
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eclipse
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occurs when the moon moves into the earth's shadow
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lunar eclipse
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darkest zone of the shadow
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umbra
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around the umbra lighter zone
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penumbra
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occurs when Earth moves into the moons shadow
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solar eclipse
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four main divisions of the year
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season
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angle of a planets rotational axis
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axial tilt
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distances north and south of the equator
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latitude
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2 times of the year when the sun's direct rays strike Earth
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solstice
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egual night - both hemispheres have 12 hours of daylight and 12 hours of darkness
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equinox
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occurs when any part of the sun's disk becomes visible above the horizon
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sunrise
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is the point where the sky appears to touch the ground
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horizon
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is when the sun first completely disappears behind the horizon
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sunset
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having to do with or related to the moon
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lunar
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is the angle between a celstial object - such as the moon
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altitude
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consists ofthe central sun, the planets that orbit it and thier moons
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solar system
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huge self luminous balls of hydrogen and helium gas
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star
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is not self luminous and may be composed of rock or gas
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planets
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the path followed by an object as it revolves around another object
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orbit
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an object that orbits a planet - our moon is a one
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natural satellite
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smaller manufactured satellites that are used for communication, weather monitoring and other data collection purposes
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artificial satellite
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corrected by adjustment
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rectified
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the time at which the sun is on the meridian for a given location on earth - does not correspond with the clock
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noon
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the time at which the sun is on the meridian on the opposite side of the earth - does not correspond with the clock
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midnight
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earth refers to its spinning on its axis
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rotation
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imaginary line running through two poles around which the Earth rotates
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axis
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means an complete orbit around the sun
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revolution
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