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Crash Course Astronomy

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

Season 1 Episode 43

The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand forever, even as our view of it shrinks while space expands faster all the time.

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Full Episodes
Life in the Universe: Crash Course Astronomy #46
Episode
11:09
Crash Course Astronomy

Life in the Universe: Crash Course Astronomy #46

Phil gives the course a send off with a look at some of his favorite topics.
Season 1 Episode 46
Deep Time: Crash Course Astronomy #45
Episode
15:00
Crash Course Astronomy

Deep Time: Crash Course Astronomy #45

Our Universe’s days are numbered.
Season 1 Episode 45
A Brief History of the Universe: Crash Course Astronomy #44
Episode
12:21
Crash Course Astronomy

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.
Season 1 Episode 44
The Big Bang, Cosmology part 1: Crash Course Astronomy #42
Episode
13:09
Crash Course Astronomy

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

Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING!
Season 1 Episode 42
Dark Matter: Crash Course Astronomy #41
Episode
11:45
Crash Course Astronomy

Dark Matter: Crash Course Astronomy #41

Today on Crash Course Astronomy, Phil dives into some very dark matters.
Season 1 Episode 41
Gamma-Ray Bursts: Crash Course Astronomy #40
Episode
13:51
Crash Course Astronomy

Gamma-Ray Bursts: Crash Course Astronomy #40

The discovery of gamma-ray bursts is an epic story.
Season 1 Episode 40
Galaxies, part 2: Crash Course Astronomy #39
Episode
15:20
Crash Course Astronomy

Galaxies, part 2: Crash Course Astronomy #39

Active galaxies pour out lots of energy.
Season 1 Episode 39
Galaxies, part 1: Crash Course Astronomy #38
Episode
11:51
Crash Course Astronomy

Galaxies, part 1: Crash Course Astronomy #38

Galaxies contain gas, dust, and billions of stars or more.
Season 1 Episode 38
The Milky Way: Crash Course Astronomy #37
Episode
10:59
Crash Course Astronomy

The Milky Way: Crash Course Astronomy #37

Today we’re talking about our galactic neighborhood: The Milky Way.
Season 1 Episode 37