PBS Anywhere

Providing Support for PBS.org

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 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

See all Episodes