Exploring the Mysteries of the Expanding Universe with Adam Riess

Into the Impossible With Brian Keating

Brian Keating

Science, Physics, Natural Sciences

4.7 • 1.1K Ratings

🗓️ 4 July 2024

⏱️ 57 minutes

🔗️ Recording | iTunes | RSS

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Summary

Join my mailing list https://briankeating.com/list to win a real 4 billion year old meteorite! All .edu emails in the USA 🇺🇸 will WIN! What is the Hubble tension? How does it challenge our current understanding of the universe? Why do different methods of measuring the universe’s expansion yield different results? And does our cosmological model need a complete overhaul? I had the honor of discussing all this and more with none other than Adam Riess. Riess is a renowned astrophysicist who won the Nobel Prize in Physics for his groundbreaking research on the expansion of the universe. Through extensive measurements and collaborations with other scientists, Riess discovered an intriguing tension in the size of the expansion of the universe, which has been steadily increasing over the last decade. These results, which have reached a significant level of more than 5 sigma, have revealed an unexpected phenomenon: the universe's expansion rate seems to vary depending on whether we start from the beginning shortly after the Big Bang or from the present. In this episode of Into the Impossible, Riess and I explore the challenges of measuring distances in the universe, the possible role of dark energy, and how this challenges the concept of the cosmological principle. Tune in! Key Takeaways: 00:00 Intro 01:03 Proving Einstein wrong 06:38 Struggling with experiment results 08:57 What is the Hubble tension? 18:45 Can curiosity be cultivated and sustained? 24:05 Measuring distances in the universe using parallax 32:54 The Hubble tension persists 38:56 Revising the cosmological principle 42:47 Gravitational lensing 51:03 Surprising JWST findings 54:33 Theoretical implications of the Hubble Tension measurements 56:47 Outro — Additional resources: 📝 Get one month of Snipd Premium for free with this link: https://get.snipd.com/Cx7S/brianSnipd Snipd lets you take Smart Notes 🧠 with AI 💡 — it’s my favorite podcast player 😀 ! ➡️ Follow me on your fav platforms: ✖️ Twitter: https://twitter.com/DrBrianKeating 🔔 YouTube: https://www.youtube.com/DrBrianKeating?sub_confirmation=1 📝 Join my mailing list: https://briankeating.com/list ✍️ Check out my blog: https://briankeating.com/cosmic-musings/ 🎙️ Follow my podcast: https://briankeating.com/podcast Into the Impossible with Brian Keating is a podcast dedicated to all those who want to explore the universe within and beyond the known. Make sure to subscribe so you never miss an episode! Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:15.3	These are the best tools that we have and when we measure it we get an answer that's somewhat different and the size of this tension or significance of the difference has grown over 10 years pretty steadily so that we've reached you know more than five Sigma and through duplication of measurements other people have done with other
0:21.0	techniques what has shown up is a funny dichotomy that how
0:26.7	fast the universe is expanding seems to depend on whether you start from the
0:31.2	beginning shortly after the Big Bang or whether you start from the beginning shortly after the Big Bang or whether you start from the present.
0:36.1	And you know a story shouldn't depend on which end of the story you started.
0:39.5	That's how it looks to us and so that's why a lot of people are suspecting,
0:44.0	maybe it's the cosmogical model itself,
0:45.7	the story we tell ourselves to connect the beginning and end. Any sufficiently advanced technology is indistinguishable from magic.
0:59.0	Open the pod bay doors now Welcome everybody to another exciting episode of the Into the Impossible
1:08.0	Podcast featuring a friend, an inspiration, a local hero, and a global cosmic hero, one of the few people on Earth who proved
1:19.4	Einstein wrong and demonstrated that he actually made a blunder by calling his blunder a blunder.
1:26.4	We'll get into that.
1:27.4	It's my friend Adam Reese, Professor, Bloomberg Professor at the Johns Hopkins University,
1:34.0	which I understand is not a plural, but it's a singular name Jones.
1:37.0	And Adam is the Bloomberg Professor.
1:40.0	He's also known for third place in the Charlie Town Symposium in 2005, which we can
1:47.8	get into some information there. There's a person that won that who was
1:51.5	supposed to go on to great things in life including
1:54.0	potentially win a Nobel Prize won't speak about him that's me we will speak about
1:58.4	the person that that did eventually achieve this this great stupendous feat and that's Adam Reese of course. So Adam as you
2:06.7	know when we have guests on the podcast that have written books we always have a segment
2:12.0	called judging books by their covers. In this case we don't have a book by you I'm hoping to be your agent and get residuals
	...

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