This month there is an eclipse of the moon that you might not notice without prior knowledge that it’s happening. It’s not a total lunar eclipse; it’s not even a partial eclipse. It is what astronomers call a penumbral eclipse. The eclipse occurs on the evening of February 10.
A lunar eclipse occurs when the moon, in its orbit about the Earth passes through its shadow. Because all three bodies must be lined up with the Earth in the middle, a lunar eclipse happens at the time of full moon. Continue reading “A Most Subtle Eclipse of the Moon”