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The Astrophysics PodcastAuthor: Paul Duffell
Once a month, Purdue University's Professor Paul Duffell discusses astronomy and astrophysics with experts from around the world. Duffell and guests discuss supernovae, galaxies, planets, black holes, and the nature of space and time.Supported by the National Science Foundation under grant AAG-2206299.Music by Brittain Ashford.Produced in beautiful Lafayette, Indiana by Paul Duffell.Follow us on BlueSky! Language: en Genres: Astronomy, Physics, Science Contact email: Get it Feed URL: Get it iTunes ID: Get it |
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Dr. Gurtina Besla -- Dark Matter in the Milky Way
Episode 2
Saturday, 31 January, 2026
Most of the mass in the universe is invisible. We call it "Dark Matter", and the only reason we know it's there is because we can see how it gravitationally interacts with regular matter. For example, in our own galaxy, Dark Matter comprises most of the mass, in a large spherical "halo" that binds the smaller spiral of gas and stars that we can see. As all our stars orbit the Milky Way, they are passing through a sea of dark matter, and this should create observable consequences that allow us to test theories about the nature of dark matter itself. Dr. Gurtina Besla develops large-scale computer simulations of the Milky Way to compute these observational signatures, allowing us to put our theories of dark matter to the test inside our own galaxy.
