Crash Course – Astronomy – 45: Deep Time

This is the forty-fifth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video describes what astronomers and cosmologists think will happen in the deep future of the universe, stretching as much as 10^92 (100,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000) years into the future.

From the video description:

Table of Contents:

  • The Universe’s Days Are Numbered 0:32
  • Stars Eventually Die Out 3:02
  • Protons Eventually Decay 5:04
  • Bye-Bye Black Holes After 10^92 Years 7:49
  • With Death Comes Life 12:04

Crash Course – Astronomy – 44: A Brief History of the Universe

This is the forty-fourth video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video describes the beginnings of the universe from the big bang to the creation of the first atoms.

From the video description:

Table of Contents:

  • Mapping the History of the Universe Using Math and Observations 00:41
  • It Started With A Bang! 1:58
  • Rapid Expansion Smoothed Out Matter 4:55
  • Normal Matter Formed After 3-20 Minutes 5:12

Crash Course – Astronomy – 43: Dark Energy, Cosmology part 2

This is the forty-third video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video explains why cosmologists think that an unknown form of energy exists, that it makes up the majority of the universe’s energy, and of what it might consist. It also covers the expansion of the spacetime, and the consequences for the observable universe.

From the video description:

Table of Contents:

  • Majority of the Universe is Made of Dark Energy 4:35
  • Dark Energy Accelerates the Expansion of Space 3:42
  • We Think The Universe Will Expand Forever 5:20

Crash Course – Astronomy – 42: The Big Bang, Cosmology part 1

This is the forty-second video of the Crash Course – Astronomy series, hosted by Dr. Phil Plait. This video covers the discovery of the beginning of the universe in the Big Bang, and the Cosmic Microwave Background.

From the video description:

Table of Contents:

  • Distant Galaxies Show a Red Shift in Their Spectra 2:07
  • The Universe is Expanding 2:51
  • This Model is Called “The Big Bang” 5:12
  • The Universe is Almost 14 Billion Years Old 11:43