 So, most large stars, more than eight times the mass of our sun, die in brilliant explosions called supernova. But some undergo near-death experiences, having a small eruption about a year before they eventually collapse and die. So, the moment this star collapses, the moment a neutron star or black hole is created. But this shockwave, this near-death experience, will go out into the star system, hitting the other planets. And by hitting the other planets, it may actually affect the atmosphere and conditions of those planets, and therefore affect the possibility of hosting life. So by knowing the ranges of stars and planetary systems and what they end and how they end will tell us, is there life elsewhere out there in the universe.