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Earth, Moon and Sun

TermDefinition
astronomy the study of the moon, stars and other objects in space
astronomer a scientist who studies the universe beyond Earth
axis an imaginary line that passes through Earth's center and the North and South poles
eclipse when the moon's shadow hits Earth or Earth's shadow hits the moon
lunar eclipse the blocking of sunlight to the moon that occurs when Earth is directly between the sun and the moon
moon a natural satellite that revolves around a planet
orbit the path of an object as it revolves around another object in space
phase one of the different apparent shapes of the moon as seen from Earth
rotation the spinning motion of a planet on its axis
satellite an object that revolves around another object in space
solar eclipse the blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth
solstice the two days of the year on which the sun reaches its greatest distance north or south of the equator, first day of summer or first day of winter
equinox the two days of the year on which neither hemisphere is tilted toward or away from the sun, first day of spring or fall
seasons each of the four divisions of the year (spring, summer, autumn, and winter) marked by particular weather patterns and daylight hours, resulting from the earth's changing position with regard to the sun.
full moon the entire sunlit side of the moon faces the Earth
new moon the sunlight side of the moon faces away from Earth
waxing the lighted part of the moon is increasing, light is on the right
waning the lighted part of the moon is decreasing, light is on the left
rotation the Earth spins on it axis once every 24 hours
revolution the Earth revolves or orbits around the sun once every 365 1/4 days
Northern hemisphere the area of Earth north of the equator
Southern hemisphere the area of Earth south of the equator
countercloclwise when an object moves in the opposite direction of the hands on a clock
Created by: DAddison
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