It seems obvious that you wouldn't want a supernova exploding near Earth. Yet there is growing evidence that one did—actually, more than one. About 10 million years ago, a nearby cluster of supernovas went off like popcorn. We know because the explosions blew an enormous bubble in the interstellar medium, and we're inside it.
A new ScienceCast video examines evidence that our solar system is inside a bubble of hot gas created by supernova explosions. Play it
More - Link >>> http://science.nasa.gov/science-news/science-at-nasa/2014/26aug_localbubble/
Source: NASA Science News.
2014: 75th Year of Pittsburgh's Buhl Planetarium
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