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Published: Aug. 26, 2023, 7 p.m.

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There is a disagreement in measurements of the Hubble constant often referred to as The Crisis in Cosmology. One way to solve it is to observe redshift drift. However, it requires lengthy observations. But my guest, Dr Geraint Lewis, has a hack up his sleeve \\u2014 gravitational lensing.

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\\U0001f449 Redshift Drift story on Universe Today:
\\nhttps://www.universetoday.com/162845/a-new-way-to-measure-the-expansion-rate-of-the-universe-redshift-drift/
\\n\\U0001f449 The Redshift Difference in Gravitational Lensed Systems: A Novel Probe of Cosmology:
\\nhttps://arxiv.org/abs/2308.07529

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\\U0001f449 Dr Geraint Lewis\' website: https://www.geraintflewis.com/
\\n\\U0001f449 Twitter/X: https://twitter.com/Cosmic_Horizons

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\\U0001f984 Support us on Patreon:
\\nhttps://patreon.com/universetoday

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\\U0001f4da Suggest books in the book club:
\\nhttps://www.goodreads.com/group/show/1198440-universe-today-book-club

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• 00:00:00 Intro
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• 00:01:41 Understanding the expansion of the Universe
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• 00:03:10 Hubble Tension and Crisis in Cosmology
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• 00:05:53 Cosmic ladder of distances
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• 00:17:30 CMB measurements
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• 00:24:47 The Boring Solution
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• 00:31:10 The Exciting Solution
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• 00:37:25 Red Shift Drift
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• 00:48:05 Time machine for free
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• 00:54:14 Perfect solution with unlimited funds
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• 00:57:05 Advice for young astronomers
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• 01:03:44 Outro
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\\U0001f4fa VIDEO VERSION
\\nhttps://youtu.be/JGYHwpsMQ1w

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\\u2696\\ufe0f LICENSE
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