A scientific mystery

M: I don't know why, but the sun in the fall at this time of day seems really bright and intense.
C: It's because of the angle of the sun.
M: Isn't that always the same?
C: No. The sun is moving towards the Tropic of Cancer so the angle of the light is different. I think.
M: I don't get that.
C: I think physics explains it.
M: There are things physics can't explain. Like why the moon looks so big when it's close to the horizon.
C: Or why I'm so awesome.
M: It's true. It's one of the great mysteries of science.

HRH