Approximately how often do lunar eclipses occur?
A) twice every year
B) three times every year
C) once per month
D) twice every 11 months
E) once every 11 years

Question

Quizplus · Accepted Answer

Lunar eclipses occur when the Earth is between the Sun and the Moon, and the Moon passes through the Earth's shadow. This can only happen when the Moon is full, and the Earth, Moon, and Sun are aligned in a straight line. Since the Moon's orbit around the Earth is tilted with respect to the Earth's orbit around the Sun, lunar eclipses do not occur every month. Instead, they occur about twice every 11 months.

Approximately How Often Do Lunar Eclipses Occur