why don't we see the lunar eclipse every time we see a full moon?

Answer 1

We don't see a lunar eclipse every time there is a full moon because the moon's orbit around the Earth is inclined at an angle of about 5 degrees with respect to the Earth's orbit around the sun. This means that during most full moons, the moon passes above or below the Earth's shadow, and the shadow doesn't fall on the moon's surface.

Lunar eclipses occur when the moon passes through the Earth's shadow, which can only happen when the Earth, moon, and sun are perfectly aligned. This alignment happens only a few times a year, and during those times, we can observe a lunar eclipse.