Look Who it Was Random video

The Universe Unravelled - P. James Peebles

1,161 views · Published 24 January 2013 · 49:14 · Indexed 27 September 2026

Channel: International Centre for Theoretical Sciences · 2013 · Science & Technology

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Speaker : P. James Peebles
Date and Time : 13 Dec 11, 14:00
Venue : Homi Bhabha Auditorium, TIFR, Mumbai

What are we? Where do we come from? Where are we going? In the language of physics, these become: What is the structure of matter? How did the Universe evolve? How will it evolve in the future? John Wheeler's famous mantra, IT from BIT, envisaged the Universe as an information structure of BITs. And, of course, so IT is, fundamentally quantum and statistical, the manypaths/ many-worlds story with our Universe expanding from a initial hot dense state. This idea of an expanding Universe grew out of observations of the motions of the galaxies around us, and a series of discoveries turned the idea of expansion into a convincingly demonstrated aspect of reality. A notable piece of the evidence of this hot big bang is the fossil thermal radiation left from the past. There is an intimate entanglement of theory with precision 'first-light' and other cosmic data. Examination of the properties of this radiation, and of the galaxies and the nature of space-time around them, shows that the expansion is well described by Einstein's theory of gravity, general relativity. This theory tells us that there is a warped side to our Universe: objects and phenomena that are made from warped space and warped time. Three examples are black holes, the big-bang in which our Universe was born, and ripples in the fabric of spacetime called gravitational waves.

In this public event, the four eminent speakers will unravel the fascinating story of our Universe and broaden the enquiry into the vast sweep of ideas about the nature of our Universe. Some details about each of these lectures and the lecturers can be accessed by clicking on the four images below.

Table of Contents (powered by https://videoken.com)
0:00:00 Introduction
0:02:19 The Universe Unravelled
0:13:14 Dedicated Astronomers
0:15:01 Expanding Universe
0:16:13 The Expanding Universe - Theorys
0:18:47 Essence Supernova Survey
0:19:27 1948 George Gamow
0:20:39 Microwave radiometer
0:21:26 Bell Telephone Laboratories Crawford Hill
0:22:17 Ultra-Low-Noise measurements using a Horn Reflector antenna and a Travelling-Wave Maser
0:25:50 Selected Measurements of CMB Spectrum
0:29:45 Department of Terrestrial Magnetism
0:30:18 Einstein's Cosmological Constant
0:32:49 New inframed Hubler Diagram
0:40:41 Conclusion

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