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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.
Meteors: Crash Course Astronomy #23
Welcome to school without the classroom! Join host Phil Plait and discover everything there is to know about the cosmos.
Meteors: Crash Course Astronomy #23
Season 1 Episode 23 | 11m 21s
Today Phil helps keep you from ticking off an astronomer in your life by making sure you know the difference between a meteor, meteorite, and meteoroid. When the Earth plows through the stream emitted by a comet we get a meteor shower. Meteors burn up about 100 km above the Earth, but some survive to hit the ground.
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