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Crash Course Astronomy
Dark Energy, Cosmology part 2: Crash Course Astronomy #43
Season 1
Episode 43
The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand forever, even as our view of it shrinks while space expands faster all the time.
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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.
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.
11:51
Galaxies contain gas, dust, and billions of stars or more.
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.