During a lunar eclipse, Earth comes between the Sun and the Moon, blocking the sunlight falling on the Moon. ... A total lunar eclipse occurs when the Moon and Sun are on opposite sides of Earth. A partial lunar eclipse happens when only part of Earth's shadow covers the Moon.

How often does a lunar eclipse occur?

How often do lunar eclipses happen? A lunar eclipse happens between two to five times a year, with a total lunar eclipse occurring at least two every three years.

How do solar and lunar eclipses occur?

Solar eclipses occur when the Moon passes between Earth and the Sun, leaving a moving region of shadow on Earth's surface. Lunar eclipses occur when Earth passes between the Sun and the Moon, casting a shadow on the Moon. ... The shadow of the Moon sweeps over the surface of Earth.