Boy, the taxpayers certainly got their money's worth from the Hubble Space Telescope! A site on the net declares that the pictures on this page are among the 25 greatest pictures ever taken by Hubble, but the site failed to say what the pictures were. There were no captions! I have no idea what most of these images are!
Could this (above) be two galaxies that nearly collided? What is the jet stream that's emanating from the one on the right? Is it a gamma ray jet or just the arm of the galaxy seen edge-on?
I'm guessing that this (above) is an explosion in progress. It seems to have created shock waves in the disk of debris that may have been ejected before the explosion.
For comparison, here's (above) the expanding fireball from an American nuclear detonation in the 60s.
This barbell shape (above) is a common explosive pattern, I don't know why. And what are the nipples on either end?
I'll hazard a guess and speculate that these (above) are stars from the middle of our own galaxy where stars are densely packed, and move rapidly.
Sorry if I've posted this one before (above). It's an optical light picture of the first planet outside our own solar system ever to be photographed: Fomalhaut B.
Maybe the remnants of multiple novas in the same area? I've read that clustered stars get to a certain age then go off like fireworks in a chain, one after the other.
I couldn't resist adding a final picture from a different source, a blog called "Astronomy Picture of the Day" (link on the sidebar). That's (above) the North Pole of Saturn as recently revealed by Cassini and, believe it or not, that's a giant hexagon in the clouds. It's been there for years, nobody knows why. Every once in a while straight, dark spokes emanate from it, and no one knows where they come from either. The dots are cyclones. The center is dark because JPL couldn't get good resolution on it.
Many thanks to Buzz who sent me the link in a comment.