Ep. 749: Dark Energy Changing Over Time

Astronomy Cast

Science, Astronomy, Natural Sciences, Space

4.8 • 3.4K Ratings

🗓️ 31 March 2025

⏱️ 32 minutes

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Summary

Astronomy Cast Ep. 749: Dark Energy Changing Over Time By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 24, 2025. The Hubble Tension is a vexing problem, with astronomers measuring the expansion of the Universe at different points in its history and getting different results. Errors have mostly been ruled out, which leaves the potential for new physics. Has the strength of dark energy been changing over time? We thought Dark Energy was constant with time, but new results from DESI say maybe not, and honestly, if it wasn't constant the Hubble Tension would be a whole lot easier to solve. SUPPORTED BY YOU! This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. Thanks to: BogieNet, Stephen Vei, Jeanette Wink, Siggi Kemmler, Andrew Poelstra, Brian Cagle, David Truog, Ed, David, Gerhard Schwarzer, Sergio Sancevero, Sergey Manouilov, Burry Gowen, David Rossetter, Michael Purcell, Jason Kwong

Transcript

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0:00.0	I'm
0:02.0	Oh Thank you. I'm Astronomycast, Episode 749 is dark energy changing over time.
0:55.3	Welcome to astronomy cast, our weekly facts-based journey through the cosmos,
0:58.7	where we help you understand not only what we know, but how we know what we know.
1:02.2	I'm Fraser Kane.
1:02.9	I'm the publisher of the universe today.
1:04.6	With me, as always, is Dr. Pamela Gay, a senior scientist for the Planetary Science Institute
1:08.9	and the director of Cosmo Quest. Hey, Pamela,
1:11.3	how you doing? I am feeling like I wasted my weekend by doing nothing but reading a book,
1:19.3	but at the same time, that was like the absolute best way I could spend my weekend.
1:24.3	Yes.
1:24.5	So, folks, there are books out there. Read them. I'm currently reading Ancillary Justice
1:29.8	and it's two sequels. I did not know it was a trilogy. That's on my list. Yeah, I really want
1:34.0	read that book. Yeah. Okay. It's, it's, it's, it's totally worth it. Okay. It's occasionally you
1:39.7	have to go back and reread things because the context changes on you and it's like, oh.
1:44.7	Oh, so you have to concentrate?
1:46.7	Yeah.
1:47.3	That's a big ask right now, but sure.
1:49.6	Yeah, it's like that and the giddy and the ninth books require concentration, but they're all totally worth it.
1:57.5	No regrets.
1:59.5	And so I would like to say to all of you, if you like me need to occasionally escape this timeline, I'm not sure how we landed on books.
2:10.7	Yes.
	...

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