Remember orbit means that one thing spins around the outside of another thing.
We know the moon orbits around the earth, and is kind of close to the earth.
We also know the earth orbits around the sun.
What happens when the moon spins around the earth, and is right between the earth and the sun?
That's called a solar eclipse.
The moon gets right between the earth and the sun, and blocks out the sun!
(from: wikipedia - solar eclipse)
When the moon is in just the right position, it blocks out pretty much the whole sun, and the earth gets dark light night time, even though it's day time!
(from: wikipedia - solar eclipse)
Kid Facts - Blast from the past: Earth