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Crash Course Astronomy

Meteors: Crash Course Astronomy #23

Video duration: 11:21

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.

Episodes of Crash Course Astronomy46

Video thumbnail: Crash Course Astronomy Life in the Universe: Crash Course Astronomy #46

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.

11:09

Life in the Universe: Crash Course Astronomy #46

11:09

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.

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Deep Time: Crash Course Astronomy #45

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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

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