Lunar eclipses are fairly common. Tend to happen about twice a year on average when the moon's path across the ecliptic lines up with the earth's shadow opposite the sun.

Solar eclipses tend to happen around the same timing but they are rarer because the moon is smaller than the earth so the shadow is smaller and the angles needed for one to be visible are tighter.

Eclipses on the gas giant planets like Jupiter tend to be a lot more common and you can see them with a telescope if you want. Io tends to cast a shadow on Juptier very often. Every day or two.