Cosmos

Season 1 Episode 8

Travels in Space and Time

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Aired Unknown Nov 16, 1980 on PBS
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Travels in Space and Time
AIRED:
What is a "Light Year"? Will we ever be able to tour the universe in spaceships, and if so, how will we do it? Is time travel possible and what would be its effects? Einstein's theory says that as a space ship moves faster, time onboard would slow down and the mass of the ship would become greater. Dr. Sagan also travels to Italy and introduces the young Einstein as he ponders beams of light and their speed.moreless

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