How does a lunar eclipse happen?
Quick Answer
A lunar eclipse happens when Earth moves directly between the Sun and the Moon, casting Earth’s shadow on the Moon. It can only occur at full moon and only when the alignment is just right.
The Full Story
During a lunar eclipse, the Moon passes through Earth’s shadow, which is divided into a lighter penumbra and a darker umbra. Because the Moon’s orbit is tilted relative to Earth’s orbit around the Sun, eclipses do not happen every full moon. When sunlight filters through Earth’s atmosphere, the Moon can take on a reddish color during totality. Lunar eclipses have been observed and recorded for thousands of years and remain easy to watch without equipment.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Why the Moon turns red when Earth gets in the way"
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.