By Graham ShelbyA total lunar eclipse will occur early Tuesday morning. That's where the earth passes between the sun and the moon. The earth’s shadow falls across the face of the moon. University of Louisville physics and astronomy professor Tim Dowling says if you stay up a little after midnight, you’ll see what looks like the moon disappearing before your eyes.“It disappears for over an hour. You’ll be able to see it, actually, because there’s reflections from the earth. While it’s in the shadow, it’ll either be very difficult to see or it’ll be a dark, dark red color, which is really remarkable to see the full moon that’s red, you don’t see that very often," he said.You can safely watch a total lunar eclipse with the naked eye – provided the skies are clear.