List server
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 42 The Big Bang, Cosmology Part 1
8.00 12 minutes Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the universe began - with a bang.
