Earth, Sun, Moon System Vocab

An imaginary line that passes through a planet’s center and its north and south poles, about which the planet rotates.

The spinning motion of a planet on its axis.

The movement of an object around another object.

A large, gaseous body at the center of the solar system.

A natural satellite that orbits a planet.

the path of an object as it revolves around another object in space.

The partial or total blocking of one object in space by another.

The part of a shadow surrounding the darkest part.

The darkest part of a shadow.

Term describing a model of the universe in which Earth is at the center of the revolving planets and stars.

Term describing a model of the solar system in which Earth and the other planets revolve around the sun.

Either of the two days of the year on which neither hemisphere is tilted toward or away from the sun.

Either of the two days of the year on which the sun reaches its greatest distance from the equator.

The periodic rise and fall of the level of water in the ocean.

This means that high tides are higher and low tides are lower than average.

The tide with the least difference between consecutive low and high tides.

One of the different shapes of the moon as seen from Earth.

The scientific law that states that every object in the universe attracts every other object.