What Causes a ‘Solar Eclipse’ and How Often Does It Happen?

The sun sometimes disappears because the moon moves in front of it. Imagine the moon is like a giant shield that blocks part or all of the sun. This only happens when the moon, Earth, and sun are perfectly lined up, which doesn’t happen very often. Sometimes you can see the sun as a bright circle around the moon, and sometimes the whole sun gets covered, it’s like magic in the sky!