This week we look at two space-related stories in the news recently: the release of an image of Sagittarius A star, a supermassive black hole at the center of the Milky Way, and the progress made by NASA's Perseverance Rover in its search for life on Mars. We are joined by two guests, Barnard College astrophysicist and author Janna Levin and University of Southampton geochemistry professor Jessica Whiteside.
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