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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.
Exoplanets: Crash Course Astronomy #27
Welcome to school without the classroom! Join host Phil Plait and discover everything there is to know about the cosmos.
Exoplanets: Crash Course Astronomy #27
Season 1 Episode 27 | 11m 49s
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 we've even found planets that are the same size as Earth. We think there may be many billions of Earth-like planets in our galaxy.
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