Science Friday Are Space Elevators Really A Possibility?
Aug 21, 2024
What if we could send people to space without rockets? The idea of space elevators has captivated our imagination for years. Discover the engineering challenges of building a long cable reaching 22,000 miles into orbit. Learn about groundbreaking materials like carbon nanotubes that might make this dream feasible. Innovations in power mechanisms, including magnetic levitation, take center stage. Plus, explore the thrilling prospect of turning these elevators into space tourism hot spots. The future of space travel is closer than you think!
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Why Graphene Is So Strong
- Graphene and carbon nanotubes offer strength hundreds of times that of steel for equivalent mass.
- Single-molecule layers with covalent bonds retain strength unlike grain-structured bulk materials.
Start At Geostationary And Pay Out Tethers
- Build the initial tether by hauling thin cables to geostationary orbit and pay them out oppositely to balance the center of gravity.
- Then reinforce the tether by laying additional layers to reach required thickness and strength.
Choose Wheels Or Maglev For Climbers
- Power climbers by gripping wheels or use maglev technology to move along the tether.
- Prefer maglev where feasible to avoid contact wear, but counter-rotating wheels are a practical near-term option.