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Crash Course Astronomy

Comets: Crash Course Astronomy #21

Season 1 Episode 21

Today on Crash Course Astronomy, Phil explains comets. Comets are chunks of ice and rock that orbit the Sun. When they get near the Sun the ice turns into gas, forming the long tail, and also releases dust that forms a different tail. WeÕve visited comets up close and found them to be lumpy, with vents in the surface that release the gas as ice sublimates.

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Full Episodes
Nebulae: Crash Course Astronomy #36
Episode
12:01
Crash Course Astronomy

Nebulae: Crash Course Astronomy #36

Astronomers study a lot of things, but nebulae might be the most beautiful of them all.
Season 1 Episode 36
Star Clusters: Crash Course Astronomy #35
Episode
10:21
Crash Course Astronomy

Star Clusters: Crash Course Astronomy #35

Last week we covered multiple star systems, but what if we added thousands to the mix?
Season 1 Episode 35
Binary and Multiple Stars: Crash Course Astronomy #34
Episode
11:46
Crash Course Astronomy

Binary and Multiple Stars: Crash Course Astronomy #34

Binary stars are gravitationally bound together in the same system.
Season 1 Episode 34
Black Holes: Crash Course Astronomy #33
Episode
12:11
Crash Course Astronomy

Black Holes: Crash Course Astronomy #33

Stellar mass black holes form when a very massive star dies, and its core collapses.
Season 1 Episode 33
Neutron Stars: Crash Course Astronomy #32
Episode
12:42
Crash Course Astronomy

Neutron Stars: Crash Course Astronomy #32

In the aftermath of a some stars we find a weird little object known as a neutron star.
Season 1 Episode 32
High Mass Stars: Crash Course Astronomy #31
Episode
12:02
Crash Course Astronomy

High Mass Stars: Crash Course Astronomy #31

Massive stars fuse heavier elements in their cores than lower mass stars.
Season 1 Episode 31