348. Black Holes, Time Travel, and the Origin of the Universe | Dr. Brian Keating

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Apr 13, 2023

Dr. Brian Keating, a renowned cosmologist and author known for his work on the Big Bang, engages in a fascinating dialogue about the universe's origins. They explore the complexities of cosmic expansion and the groundbreaking capabilities of the James Webb Space Telescope. Keating discusses the shift from Einstein's static universe to concepts of dark energy and gravitational waves, while connecting artificial intelligence to emotional understanding. The conversation delves into the philosophical implications of scientific discovery, inviting listeners to ponder the vast mysteries of existence.

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INSIGHT

Telescopes as Time Machines

Telescopes, including our eyes, are time machines because light travels at a finite speed.
The farther away an object, the older the light we receive, showing us the past.

INSIGHT

James Webb Telescope

The James Webb telescope's power comes from its infrared capabilities, allowing it to see early galaxies and stars.
It detects infrared light, which visible light redshifts to as the universe expands.

INSIGHT

Electromagnetic Spectrum and Redshift

The electromagnetic spectrum is continuous, with infinite colors beyond visible light, like infrared and ultraviolet.
Redshift, like a siren's changing pitch, happens when light wavelengths stretch as objects move away.

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