I need to recommend Astronomy Cast to anyone interested in this stuff, simply because it's <i>so</i> good. They cover individual astronomy topics in 30 minute shows.<p>There's an episode all about the Oort Cloud and the interstellar medium (the regions Gilese would be skirting past) in <a href="http://www.astronomycast.com/astronomy/episode-65-the-end-of-our-tour-through-the-solar-system/" rel="nofollow">http://www.astronomycast.com/astronomy/episode-65-the-end-of...</a><p>And if Gilese's ability to send a ton of comets into the inner Solar System scares you, you might want to miss the "Death From The Skies" episode where they cover all of the myriad of ways we could get wiped out in way less than 1 million years ;-) <a href="http://www.astronomycast.com/people/interviews/ep-112-death-from-the-skies-interview-with-phil-plait/" rel="nofollow">http://www.astronomycast.com/people/interviews/ep-112-death-...</a>