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Crash Course Astronomy

Exoplanets: Crash Course Astronomy #27

Video duration: 11:49

Phil explains that YES, there are other planets out there and astonomers have a lot of methods for detecting them. Nearly 2000 have been found so far. Exoplanets appear to orbit nearly every kind of star, and weÕve even found planets that are the same size as Earth. We think there may be many billions of Earth-like planets in our galaxy.

Episodes of Crash Course Astronomy45

Video thumbnail: Crash Course Astronomy Deep Time: Crash Course Astronomy #45

Crash Course Astronomy

Deep Time: Crash Course Astronomy #45

Our Universe’s days are numbered.

15:00

Deep Time: Crash Course Astronomy #45

15:00

Video thumbnail: Crash Course Astronomy A Brief History of the Universe: Crash Course Astronomy #44

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.

12:21

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

12:21

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

Crash Course Astronomy

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.

11:08

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

11:08

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

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!

13:09

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

13:09

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