Crash Course Astronomy

Join host Phil Plait in a Crash Course about the cosmos.

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Episodes

  • Deep Time: Crash Course Astronomy #45

    Our Universe’s days are numbered.
  • A Brief History of the Universe: Crash Course Astronomy #44

    Thanks to the wonders of physics, we can map a timeline of the universe’s history.
  • Dark Energy, Cosmology part 2: Crash Course Astronomy #43

    Most of the universe is made up of a mysterious entity that pervades space: dark energy.
  • The Big Bang, Cosmology part 1: Crash Course Astronomy #42

    Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING!
  • Dark Matter: Crash Course Astronomy #41

    Today on Crash Course Astronomy, Phil dives into some very dark matters.
  • Gamma-Ray Bursts: Crash Course Astronomy #40

    The discovery of gamma-ray bursts is an epic story.
  • Galaxies, part 2: Crash Course Astronomy #39

    Active galaxies pour out lots of energy.
  • Galaxies, part 1: Crash Course Astronomy #38

    Galaxies contain gas, dust, and billions of stars or more.