Astronomy Cast

Wizzard Media

Science & Medicine, Natural Sciences

Chart Positions

Science & Medicine 15
Natural Sciences 5

Astronomy Cast brings you a weekly fact-based journey through the cosmos.


Ep. 144: Space Elevators

June 29th, 2009

Episode 175 of 460 episodes

If you want to travel into the Solar System, you have to get off the Earth. Traditionally, that meant blasting off in a rocket. But there's another strategy for escaping the Earth's gravity. Climb to the top of an extremely tall tower, and just jump away. That's the idea behind space elevators. Theoretically possible, but practically unfeasible, space elevators have gotten new life thanks to new, super strong materials.

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