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Ep. 682: Ultra-Diffuse Galaxies & Dark Matter
365 Days of Astronomy - Weekly Edition
English - May 22, 2023 20:00 - 1 hour - 29.3 MB - ★★★★★ - 14 ratingsNatural Sciences Science astronomy space science planets supernova black holes telescopes telescope Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
Previous Episode: Ep. 681: Kilonovae
Next Episode: Ep. 683: Cosmic Dawn
Astronomers first noticed the strange behaviors of rotating galaxies almost 100 years ago, suggesting there’s an invisible dark matter hold them together with gravity. Or maybe we just don’t understand how gravity works at the largest scales. Observations are much better now, and astronomers have found examples of galaxies that are almost entirely made of dark matter. Does this tell us anything?