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Galaxies, part 2: Crash Course Astronomy #39

Season 1 Episode 39 | 15m 20s

Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist in smaller groups and larger clusters. Our Milky Way is part of the Local Group, and will one day collide with the Andromeda galaxy.

Aired: 11/04/15
Extras
Phil gives the course a send off with a look at some of his favorite topics.
Our Universe’s days are numbered.
Thanks to the wonders of physics, we can map a timeline of the universe’s history.
Most of the universe is made up of a mysterious entity that pervades space: dark energy.
Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING!
Today on Crash Course Astronomy, Phil dives into some very dark matters.
The discovery of gamma-ray bursts is an epic story.
Galaxies contain gas, dust, and billions of stars or more.
Today we’re talking about our galactic neighborhood: The Milky Way.
Latest Episodes
Phil gives the course a send off with a look at some of his favorite topics.
Our Universe’s days are numbered.
Thanks to the wonders of physics, we can map a timeline of the universe’s history.
Most of the universe is made up of a mysterious entity that pervades space: dark energy.
Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING!
Today on Crash Course Astronomy, Phil dives into some very dark matters.
The discovery of gamma-ray bursts is an epic story.
Galaxies contain gas, dust, and billions of stars or more.
Today we’re talking about our galactic neighborhood: The Milky Way.
Astronomers study a lot of things, but nebulae might be the most beautiful of them all.