Extras

Video thumbnail: Ancient Skies The Universe is Expanding

Ancient Skies

The Universe is Expanding

Georges LemaƮtre proposes that the universe is expanding.

The Universe is Expanding

Video thumbnail: Ancient Skies Cannon Shot to the Moon

Ancient Skies

Cannon Shot to the Moon

Hear Jules Verne's story of a cannon shot to the moon.

Cannon Shot to the Moon

Video thumbnail: Ancient Skies The Marine Chronometer

Ancient Skies

The Marine Chronometer

Take a closer look at John Harrison's Marine Chronometer.

The Marine Chronometer

Video thumbnail: Ancient Skies Shattering the Spheres

Ancient Skies

Shattering the Spheres

Astronomer Tycho Brahe overturns 1,500 years of scientific belief.

Shattering the Spheres