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Into the Impossible With Brian Keating

Nobel Laureate Adam Riess: Tension In The Cosmos! (#329)

Into the Impossible With Brian Keating

Brian Keating

Science, Physics, Natural Sciences

4.71.1K Ratings

🗓️ 9 July 2023

⏱️ 60 minutes

🧾️ Download transcript

Summary

Watch the full video on youtube here: https://youtu.be/b3Tx1g8gKmY Other Episode with Adam Riess: https://youtu.be/WZUqzHRuzhA Adam Riess is a renowned astrophysicist recognized for his groundbreaking research on the expansion of the universe with the 2011 Nobel Prize in physics Through extensive measurements and collaborations with other scientists, Riess discovered an intriguing tension in the size of the universe's expansion, which has steadily grown over the past decade. These results, reaching a significant level of more than 5 sigma, revealed an unexpected phenomenon: the rate of the universe's expansion seems to differ based on whether one starts from the beginning shortly after the big bang or from the present. This unexpected autonomy in the expansion challenged the traditional cosmological model, which tells the story of the universe's evolution from its inception to its current state. Riess's research has generated suspicion among many scientists, leading them to question whether the cosmological model itself needs revision. In his pursuit of unraveling the mysteries of the universe, Riess reminds us that advanced technology may often be mistaken for something magical. On this episode of INTO THE IMPOSSIBLE Riess explores the challenges of measuring distances in the universe and the discrepancies between measurements of the expansion rate of the universe first observed by Edwin Hubble namesake of The Hubble Constant, a pillar of cosmology. From the use of parallax (dating back to ancient Greece) to the use of Cepheid variables and Type 1a supernovae, Riess takes listeners on a journey through the cosmic distance ladder and the problem of the variation in the measurement of the Hubble constant known as the Hubble Tension. The possible role of dark energy is discussed, opening up new avenues for scientific investigation. Riess shares insights into the concept of the cosmological principle, and how it is challenged by the Hubble Tension. The conversation touches on peak experiences, the awe-inspiring encounters with nature that trigger moments of gratitude and curiosity, and the importance of sustaining these feelings in scientific exploration. Riess highlights the empirical nature of observational cosmology and the need for continued data collection and refining of models. Black holes, gravitational lensing, and Adam’s motivations to pursue precision science are discussed. Please join my mailing list 👉 briankeating.com/list for your chance to win a real meteorite 💥! Join me and ⁦Lawrence Krauss for an Onstage Dialogue ⁦at the San Diego Air & Space Museum Tuesday, Oct 17, 2023 at 7:00 PM: https://www.eventbrite.com/e/live-onstage-dialogue-brian-keating-lawrence-m-krauss-tickets-699430514497 Support The INTO THE IMPOSSIBLE Podcast by supporting our sponsors: Post your free listing at LinkedIn Jobs https://www.linkedin.com/impossible Thanks HelloFresh! Go to https://www.hellofresh.com/impossible and use code 50impossible for 50% off plus free shipping! As an Into The Impossible listener, you can get 15% off a MASTERCLASS annual membership masterclass.com/impossible Subscribe to the Jordan Harbinger Show for amazing content from Apple’s best podcast of 2018! https://www.jordanharbinger.com/podcasts Please leave a rating and review: On Apple devices, click here, https://apple.co/39UaHlB On Spotify it’s here: https://spoti.fi/3vpfXok On Audible it’s here https://tinyurl.com/wtpvej9v Find other ways to rate here: https://briankeating.com/podcast Support the podcast on Patreon https://www.patreon.com/drbriankeating Become a Member on YouTube- https://www.youtube.com/channel/UCmXH_moPhfkqCk6S3b9RWuw/join Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

Click on a timestamp to play from that location

0:00.0

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

0:14.8

so that we've reached, you know, more than 5 Sigma.

0:18.6

And through duplication of measurements other people have done with other techniques, what has of seems to depend on whether you start from the beginning shortly after the Big Bang or

0:35.8

whether you start from the present and you know a story shouldn't depend on which end of

0:40.4

the story you started that's how it looks to us and so that's why a lot of people

0:44.7

are suspecting maybe it's the cosmological model itself the story we tell ourselves

0:48.8

to connect the beginning and end. Welcome listeners.

0:57.0

Prepare for a mini master class in cosmology with another appearance

1:00.3

under the impossible of Nobel Laureate Adam Reese.

1:04.6

The Hubble Constant is a pillar of our understanding of the universe.

1:07.8

Since the observation is made by its namesake, Edwin Hubble, in 1929, the galaxies were

1:11.8

moving away from each other, the Hubble constant has been

1:14.6

persistently measured and confirmed. In 2011, Adam Reese shared a Nobel Prize by showing

1:20.9

that the expansion rate was also accelerating.

1:24.8

Since then, Dr. Reese has persevered in his quest to determine why, depending on how it's

1:29.6

measured, the rate of expansion varies far beyond the margin for error.

1:34.0

Why? Is there a problem with the cosmological principle, a pillar of cosmology?

1:39.0

What other forces of nature could be at work?

1:41.0

In this fast-moving discussion, Brian and Adam explore how the

1:44.6

Hubble tension is being measured using the world's most advanced

1:46.8

observational instruments on Earth and in space. Find out what drives precision

1:51.6

science forward and keeps Dr. Reese motivated even after receiving the

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