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Crash Course Astronomy
Distances: Crash Course Astronomy #25
Season 1
Episode 25
How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and the sizes of the Moon and Sun.
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11:46
Binary stars are gravitationally bound together in the same system.
12:11
Stellar mass black holes form when a very massive star dies, and its core collapses.
12:42
In the aftermath of a some stars we find a weird little object known as a neutron star.
12:02
Massive stars fuse heavier elements in their cores than lower mass stars.
11:09
What comes next after the death of a low mass star? A white dwarf.
12:02
Today we are talking about the life -- and death -- of stars.
11:05
Brown dwarfs have a mass that places them between giant planets and small stars.
11:49
There are many other planets outside of our own solar system, but finding them is tricky.
10:40
Phil explains stars and how they can be categorized using their spectra.
10:33
In order to understand more of universe, we need to talk a little bit about light.
11:21
What the difference between a meteor, meteorite, and meteoroid?
11:40
We're heading to the outskirts of the solar system.