Description Two massive stars face off, ready to tussle! Who will prevail? Readers get the stats from an expert astrophysicist and make their predictions before the final exciting KA-PLOOSH! It's time for the next round of outer-space, crash-and-smash fun, and this matchup is colossal! Two red supergiants are facing each other, ready for a scuffle. Each cranks out 100,000 times as much power as the Sun. (Don't get too close or you'll roast like a weenie in a campfire.) These mighty stars are equally matched, so either could come out on top-but hold on! One of the contenders has just exploded! And it's left behind a neutron star with supernova energy. Now who will be left standing after this interstellar smackdown? It's another collision of cosmic proportions in this fast-paced, fact-packed series, crammed with science, peppy illustrations, and the infectious energy of a live sporting event. Back matter provides even more info for curious fans.