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Astronomy Cast

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Feb 13, 2023

Astronomy Cast Ep. 669: Challenges to Dark Energy

by Fraser Cain & Dr. Pamela Gay

Streamed live on Feb 6, 2023.

It’s been over 20 years since astronomers first discovered that the expansion of the Universe is accelerating thanks to dark energy. And in these decades, astronomers still don’t have much evidence for what could be causing the increased expansion rate. Maybe there’s something else going on to explain it.


This video was made possible by the following Patreon members:


Burry Gowen

Jeanette Wink

Stephen Veit

Jordan Young

Venkatesh Chary

Andrew Poelstra

Brian Cagle

David Truog

Gerhard Schwarzer

THANK YOU! - Fraser and Dr. Pamela