How Do ‘Eclipses’ Happen and Why Are They So Rare?

Eclipses happen when the moon, sun, and earth line up. Like when a friend blocks your view of a lamp, that's like a lunar eclipse. When you're between two friends, one blocking the light from the other, that's like a solar eclipse. But this lining-up doesn’t happen often because the moon’s orbit is tilted, it’s kind of like a wobbly dance in space!