Solar system vocabulary

An imaginary line though the middle of a planet.

A ray crater is a lunar land form.

A mountain is a lunar landform.

A rille is a lunar landform.

A volcanic cone is a lunar land form.

Highlands are a lunar land form.

What did some astronauts recently experiment on while in space?

The path that the planet Earth takes as it travels around the sun.

When one celestial body passes through the shadow of another celestial body.

The motion of a planet as it spins on its axis.

The path that the Earth/Moon System takes as it travels around the sun.