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Crash Course Astronomy
Galaxies, part 1: Crash Course Astronomy #38
Season 1
Episode 38
Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can collide, and grow in size by eating each other.
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11:09
Phil gives the course a send off with a look at some of his favorite topics.
15:00
Our Universe’s days are numbered.
12:21
Thanks to the wonders of physics, we can map a timeline of the universe’s history.
11:08
Most of the universe is made up of a mysterious entity that pervades space: dark energy.
13:09
Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING!
11:45
Today on Crash Course Astronomy, Phil dives into some very dark matters.
13:51
The discovery of gamma-ray bursts is an epic story.
15:20
Active galaxies pour out lots of energy.
10:59
Today we’re talking about our galactic neighborhood: The Milky Way.
12:01
Astronomers study a lot of things, but nebulae might be the most beautiful of them all.
10:21
Last week we covered multiple star systems, but what if we added thousands to the mix?
11:46
Binary stars are gravitationally bound together in the same system.