Wobbly planets

Alan Boss, a space researcher, was on the Kojo Nnamdi Show this afternoon. Thanks to live streaming radio online, I was able to listen. He described several concepts that I remembered vaguely from college astronomy class, but never really understood. In particular, he discussed detecting extrasolar planets, which is really, really cool. Based on miniscule changes in location and dimming, scientists can guess at the size and orbital frequency of a distant planet. I highly recommend that you check it out.