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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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11:54
Comets are chunks of ice and rock that orbit the Sun.
11:32
Now that we've finished our tour of the planets, we're headed back to the asteroid belt.
12:15
We're rounding out our planetary tour with ice giants Uranus and Neptune.
12:12
Saturn is the crown jewel of the solar system, beautiful and fascinating
10:26
Before moving on from Jupiter, we're going to linger for a moment on the planet's moons.
10:42
Jupiter is the biggest planet in our solar system.
10:11
Mar is the fourth planet from the sun and the outermost of the terrestrial planets.
10:46
Venus is a gorgeous naked-eye planet, hanging like a diamond in the twilight.
10:17
Mercury is the closest planet to the sun.
9:47
Take a look up to the moon's surface features, core, and theories about its formation.
10:13
Phil starts the planet-by-planet tour of the solar system right here at home, Earth.
11:44
Take a look at the two-octillion ton star that rules our solar system.