Here is an inspiring and informative video on galaxies, their formation, their life-cycle, their sizes. This one is about the largest known galaxy.

Why are there hundreds or sometimes thousands of inane comments from religious people overwhelming YouTube science related videos? They have a right to post their nonsense, granted, but it would be nice to have some filter to zone them out, so we can have intelligent dialog about science related to the topic.

Then again, YouTube comments seem to be overwhelmingly idiotic for pretty much most topics. I guess I am facing the yellow, pimply underbelly of the freedom of speech.