Preview Mode Links will not work in preview mode

Astronomy Cast

Thank you for finding us on Libsyn! You can visit our full website at!


May 22, 2023

Astronomy Cast Ep. 682: Ultra-Diffuse Galaxies & Dark Matter

by Fraser Cain & Dr. Pamela Ga

Streamed live on May 15, 2023.

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?


This video was made possible by the following Patreon members:

Burry Gowen

Stephen Veit

Jordan Young

Venkatesh Chary

Andrew Poelstra

Brian Cagle

David Truog

Jeanette Wink

Gerhard Schwarzer


THANK YOU! - Fraser and Dr. Pamela