Re: Its just a big moon.
"It was near a half moon last night and the dark/light edge looked spectacular when the clouds weren't hiding it."
The technical name for the dark/light edge is "terminator", and it's even more spectacular when viewed through a telescope or binoculars because that's where the Sun is just rising, so the shadows are very long, which highlights the lunar relief. If you know when and where to look, you can see the eastern edges of craters in brilliant sunlight whilst the interior of the crater is still in darkness.