A lunar eclipse does not occur at every full Moon because the
A) eclipse cannot occur after sunset.
B) plane of the Moon's orbit is at an angle to the plane of Earth's orbit.
C) path of the Sun is inclined at an angle of 5° to the ecliptic plane.
D) orbit of the Moon is not a perfect circle.

Question

Quizplus · Accepted Answer

Lunar eclipses do not occur at every full Moon because the Moon's orbital plane is tilted about 5 degrees to the ecliptic plane (Earth's orbital plane). This means the Earth, Moon, and Sun do not align perfectly during most full Moons, preventing a lunar eclipse from happening each month.

A Lunar Eclipse Does Not Occur at Every Full Moon