00:01
One of the wrong ideas that people have about the phases of the moon is that somehow you're seeing the shadow of the earth on the moon.
00:13
And that is not what's going on.
00:17
So here we're just going to kind of show what's going on with the phases of the moon, which are created when the moon orbits the earth.
00:26
So there's a cycle, which is why it's good to use the term phase, because you can tell where the moon is in its cycle based on the phase that it appears from earth.
00:44
So what's going on in the phase is basically we're standing on earth, and we're looking at the illuminated side of the moon from different angles.
00:54
So i'll show the illuminated side is the side.
00:58
It's pointing towards the sun.
01:02
It's always the side pointing towards the sun.
01:06
And if you're on earth, okay, so i'll draw a little person on the earth.
01:14
That's supposed to be a person, not a tree, but you get the idea, is that when you look up at the moon, you may see either the backside of the moon, the unilluminated side, not the backside, but the unilluminated side of the moon at position one.
01:34
And therefore you don't see any illumination, or at position 2 and 4, you are looking up at partly the illuminated side and partly the unilluminated side.
01:51
So you get the half and half...