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Season
Season 1 Episode
- Season 1 Introduction to Astronomy
- Season 1 Naked Eye Observations
- Season 1 Cycles in the Sky
- Season 1 Moon Phases
- Season 1 Eclipses
- Season 1 Telescopes
- Season 1 The Gravity of the Situation
- Season 1 Tides
- Season 1 Introduction to the Solar System
- Season 1 The Sun
- Season 1 The Earth
- Season 1 The Moon
- Season 1 Mercury
- Season 1 Venus
- Season 1 Mars
- Season 1 Jupiter
- Season 1 Jupiter's Moons
- Season 1 Saturn
- Season 1 Uranus & Neptune
- Season 1 Asteroids
- Season 1 Comets
- Season 1 The Oort Cloud
- Season 1 Meteors
- Season 1 Light
- Season 1 Distances
- Season 1 Stars
- Season 1 Exoplanets
- Season 1 Brown Dwarfs
- Season 1 Low Mass Stars
- Season 1 White Dwarfs & Planetary Nebulae
- Season 1 High Mass Stars
- Season 1 Neutron Stars
- Season 1 Black Holes
- Season 1 Binary and Multiple Stars
- Season 1 Star Clusters
- Season 1 Nebulae
- Season 1 The Milky Way
- Season 1 Galaxies, Part 1
- Season 1 Galaxies, Part 2
- Season 1 Gamma-Ray Bursts
- Season 1 Dark Matter
- Season 1 The Big Bang, Cosmology Part 1
- Season 1 Dark Energy, Cosmology Part 2
- Season 1 A Brief History of the Universe
- Season 1 Deep Time
- Season 1 Everything, The Universe...And Life
Crash Course Astronomy - Season 1 Episode 20 Asteroids
8.00 12 minutes Now that we’ve finished our tour of the planets, we’re headed back to the asteroid belt. Asteroids are chunks of rock, metal, or both that were once part of smallish planets but were destroyed after collisions. Most orbit the Sun between Mars and Jupiter, but some get near the Earth. The biggest, Ceres is far smaller than the Moon but still big enough to be round and have undergone differentiation.
