the shadow produced by the moon or Earth passing in front of the sun

the motion of Earth that produces day and night

a group of stars, gas, and dust held together by gravity

a group of stars that form a pattern in the sky

an object that is launched into space to gather information and send it back to Earth

The tilt of Earth's ___ causes seasons.

When the moon is waning, it appears to be ___.

An astronomical unit is the distance from ___.

Earth is the ___ planet from the sun.

There may be as many as ___ galaxies in the universe.

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