First light: Revealing the Early Universe - Chris Lintott скачать в хорошем качестве

First light: Revealing the Early Universe - Chris Lintott

The final lecture in the series returns to the theme of how insight is derived from observations, considering the cosmic microwave background. This oldest light in the Universe, emitted just 400,000 years after the Big Bang, contains the seeds of the structures we see around us, and tells us about conditions at the Universe's beginning. It will also consider how measurements of the Universe's expansion, made using the CMB, are leading to unexpected results, creating tension in modern cosmology. Chapters 00:00 Introduction 02:48 Why we only see the cosmos in the past 06:58 Why JWST is an infrared telescope 10:16 Vesto Slipher's discovery that distant galaxies are redshifted 13:39 How Hubble's redshift work led to him discovering Hubble's law 18:21 How the Big Bang Theory developed 24:47 Project Echo 26:04 Telstar 26:44 Penzias and Wilson's discovery of cosmic microwave background radiation (CMBR) 32:45 Why does the universe have CMBR? 35:56 How the discovery of CMBR proved the Big Bang Theory 41:00 Why we can't explain the current expansion rate of the universe (the Hubble tension) 44:05 How new observations in Chile may solve this problem 46:25 Conclusion 48:03 Q&A Session This lecture was recorded by Chris Lintott on 29th May 2024 at Conway Hall, London Chris is Gresham Professor of Astronomy. He is also a Professor of Astrophysics at the University of Oxford, and a Research Fellow at New College. The transcript of the lecture is available from the Gresham College website: https://www.gresham.ac.uk/watch-now/f... Gresham College has offered free public lectures for over 400 years, thanks to the generosity of our supporters. There are currently over 2,500 lectures free to access. We believe that everyone should have the opportunity to learn from some of the greatest minds. To support Gresham's mission, please consider making a donation: https://gresham.ac.uk/support/ Website: https://gresham.ac.uk Twitter:   / greshamcollege   Facebook:   / greshamcollege   Instagram:   / greshamcollege