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Crash Course Astronomy

Galaxies, part 2: Crash Course Astronomy #39

Season 1 Episode 39

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.

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Black Holes: Crash Course Astronomy #33
12:11
Stellar mass black holes form when a very massive star dies, and its core collapses.
Neutron Stars: Crash Course Astronomy #32
12:42
In the aftermath of a some stars we find a weird little object known as a neutron star.
High Mass Stars: Crash Course Astronomy #31
12:02
Massive stars fuse heavier elements in their cores than lower mass stars.
White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30
11:09
What comes next after the death of a low mass star? A white dwarf.
Low Mass Stars: Crash Course Astronomy #29
12:02
Today we are talking about the life -- and death -- of stars.
Brown Dwarfs: Crash Course Astronomy #28
11:05
Brown dwarfs have a mass that places them between giant planets and small stars.
Exoplanets: Crash Course Astronomy #27
11:49
There are many other planets outside of our own solar system, but finding them is tricky.
Stars: Crash Course Astronomy #26
10:40
Phil explains stars and how they can be categorized using their spectra.
Distances: Crash Course Astronomy #25
11:20
How do astronomers make sense out of the vastness of space?
Light: Crash Course Astronomy #24
10:33
In order to understand more of universe, we need to talk a little bit about light.
Meteors: Crash Course Astronomy #23
11:21
What the difference between a meteor, meteorite, and meteoroid?
The Oort Cloud: Crash Course Astronomy #22
11:40
WeÕre heading to the outskirts of the solar system.
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