What is an eclipse?
What is an eclipse?
user
There is a new moon, so the sun and the moon are aligned on the same plane. In that moment, the shadow of the earth on the moon is a perfect eclipse.
assistant
But there's a lunar eclipse and a solar eclipse. What's the difference?
user
The lunar eclipse happens when the moon blocks the sun during the night. The solar eclipse happens when the sun blocks the moon during the day.  In a lunar eclipse, the moon appears as an orange or brown disk. In a solar eclipse, the sun looks like a crescent.
assistant
How often do they happen?
user