ASTR 160 - Lecture 21 - Dark Energy and the Accelerating Universe and the Big Rip

Lecture 21 - Dark Energy and the Accelerating Universe and the Big Rip

Overview

Class begins with a review of the mysterious nature of dark matter, which accounts for three quarters of the universe. Different models of the universe are graphed. The nature, frequency, and duration of supernovae are then addressed. Professor Bailyn presents data from the Supernova Cosmology Project and pictures of supernovae taken by the Hubble Space Telescope. The discovery of dark energy is revisited and the density of dark energy is calculated. The Big Rip is presented as an alternative hypothesis for the fate of the universe.

Resources

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Transcript

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Audio

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Low Bandwidth Video

mov [100MB]

High Bandwidth Video

mov [500MB]