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Ancient Skies

The Universe is Expanding

Season 1 Episode 3 | 2m 56s

Georges Lemaître, Belgian priest and astronomer, used Albert Einstein's equations from the Theory of General Relativity to propose that the universe is expanding.

Extras
Watch • 2:04
Ancient Skies
Cannon Shot to the Moon
Hear Jules Verne's story of a cannon shot to the moon.
Clip: S1 E3 | 2:04
Watch • 2:16
Ancient Skies
Shattering the Spheres
Astronomer Tycho Brahe overturns 1,500 years of scientific belief.
Clip: S1 E3 | 2:16
Watch • 0:30
Ancient Skies
Episode 3 Preview | Our Place in the Universe
A cast of scientific pioneers reshape our solar system.
Preview: S1 E3 | 0:30
Watch • 2:09
Ancient Skies
The Marine Chronometer
Take a closer look at John Harrison's Marine Chronometer.
Clip: S1 E3 | 2:09
Watch • 54:38
Ancient Skies
Our Place in the Universe
A cast of scientific pioneers reshape our solar system.
Episode: S1 E3 | 54:38
Watch • 55:14
Ancient Skies
Finding the Center
Episode two charts our efforts to give the earth shape and place in the cosmos.
Episode: S1 E2 | 55:14
Watch • 1:52
Ancient Skies
The Edge of the World
Explore the Greek myth of Odysseus.
Clip: S1 E2 | 1:52
Watch • 2:38
Ancient Skies
Galileo's Discoveries
Take an in depth look at the celestial bodies discovered by Galileo.
Clip: S1 E2 | 2:38
Watch • 1:58
Ancient Skies
Earth-Centered Cosmos
Explore Ptolemy's earth-centered model of the cosmos.
Clip: S1 E2 | 1:58
Watch • 0:30
Ancient Skies
Episode 2 Preview | Finding the Center
Episode two charts our efforts to give the earth shape and place in the cosmos.
Preview: S1 E2 | 0:30
Latest Episodes
Watch • 54:38
Ancient Skies
Our Place in the Universe
A cast of scientific pioneers reshape our solar system.
Episode: S1 E3 | 54:38
Watch • 55:14
Ancient Skies
Finding the Center
Episode two charts our efforts to give the earth shape and place in the cosmos.
Episode: S1 E2 | 55:14
Watch • 55:15
Ancient Skies
Gods and Monsters
Explore the earliest origins of our relationship with the skies.
Episode: S1 E1 | 55:15