Orion Nebula in Oxygen, Hydrogen, and Sulfur
(Yesterday, actually.) Click the picture for larger version, explanation and further links.
Now that's what I'd call a cool screen-saver. Wow! (That's not what it looks like through our 'scope.)
Now that's what I'd call a cool screen-saver. Wow! (That's not what it looks like through our 'scope.)