re: Astronomy Picture of the Day Challenge
Colors look like interference fringe to me. If the hole that lets light through is very far away, then it could be quite small. If small, then its image is magnified a great deal so you can see interference along the edges.
I don't have a handle on the dimensions of what is going on in the picture. Where is the camera, the ground, the light source? And I can't explain how the light source can be small and far, yet permit that much light to go through it.
PS: RL, don't start screaming at me.
