* The Moon's Orbit: The Moon orbits the Earth in a slightly tilted plane compared to the Earth's orbit around the Sun. This means the Moon doesn't always pass directly through the Earth's shadow.
* Lunar Eclipse Requirements: A lunar eclipse happens when the Earth passes directly between the Sun and the Moon, casting its shadow on the Moon. This alignment doesn't occur every month due to the tilt of the Moon's orbit.
How Often Do Lunar Eclipses Occur?
* Lunar eclipses happen about twice a year, on average.
* Total lunar eclipses are less frequent. They occur when the Moon passes entirely through the Earth's umbra (the darkest part of the shadow).
* Partial lunar eclipses are more common. They happen when only part of the Moon passes through the Earth's umbra.
Let me know if you have any other astronomy questions!
