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15 Cards in this Set

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  • Back
astronomy
The study of the universe.
axis
an imaginary line that passes through the line around which a planet or other object rotates.
big bang
the theory that the universe was created from a giant explosion.
eclipse
the partial or total clocking of one object by another.
equinox
the two days a year opon which the sun is directly over the equator.
gravity
the attractive force between two objects.
inertia
the tendency of moving objects to continue moving in a straight line or a
light-year
the distance that light travels in one year.
nebula
a large amount of gas and dust in space. It is where stars are born
orbit
the path of an object as it revolves around another object in space
phase
one of the different shapes of the moon as seen from Earth
revolution
the movement of an object around another.
rotation
the spinning motion of an object around its own axis.
solstice
the two days a year on which the sun appears directly overhead as far north or south of the equator.
universe
all of space and everything in it.