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astronomy word list

QuestionAnswer
astronomy the science of the universe
axis an imaginary line that a planet rotates on
rotation when an object spin
revolution 1 full rotation
orbit the path one an object takes around another
tilt something that is turned but not in a full rotation
solstice when the day is shortest or longest
equinox when day and night are the same time
phase The change in the shape of the Moon, Mercury, and Venus due to how much of the sunlit side is facing the Earth.
eclipse when one object in the sky is blocked by another
gravity the force that gives objects weight
tide the periodic rise and fall of the oceans
sattelite a small object orbiting a larger one
telescope an object used to see stars better
geocentric Means earth in the center
heliocentric considered as being seen from the center of the sun.
inner planet any of the four planets closest to the sun
outer planet any planets outside the orbit of Mars
comet a small frozen mass of dust revolving around the sun
asteroid A rock, or Minor Planet orbiting the Sun.
meteroid any small object in space
constellation A grouping of stars which have been given names by ancient astronomers because of the way they look.
galaxy a group of stars
universe all of space
milky way our galaxy
Created by: mato9020
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