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[Reaching for the Stars: The Future of Space Elevators]-[WeWow on the Weekend (7/27/25)]

Wow in the World · B1 · 2025-07-27

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📋 Summary

Reaching for the Stars: The Future of Space Elevators

In this episode of Wow in the World, hosts Mindy Thomas and Guy Raz explore one of the most ambitious engineering concepts of the future: the space elevator. While the hosts humorously navigate the quirks of elevator music and office building logistics, they dive deep into the science behind how humanity might one day travel to space without the need for traditional, expensive rockets.

The Concept: An Elevator to the Stars

The idea of a space elevator is not entirely new. Guy Raz explains that the concept was inspired by the Eiffel Tower in 1895, when Russian scientist Konstantin Tsiolkovsky—the pioneer of rocket travel—envisioned a structure that could reach into space. Rather than using combustion-based rockets, this proposed system functions like a "giant version of those two tin cans with a piece of string between them."

In this modern vision, one end of a cable would be attached to a platform at sea, while the other would orbit the planet like a satellite. The cable itself would be constructed from carbon nanotube composite ribbon, a material described as "incredibly strong, but also really, really light," which is essential for supporting such an immense structure.

Why Build a Space Elevator?

The primary motivation for this project is cost-efficiency. Currently, transporting cargo, such as medicine or supplies, to the International Space Station via rocket is prohibitively expensive, costing approximately $43,000 per pound ($20,000 per kilogram).

By utilizing a space elevator, researchers at JAXA (the Japan Aerospace Exploration Agency) predict that the cost to send materials into orbit could drop to roughly $100 per pound ($220 per kilogram). This shift could revolutionize space logistics, making the exploration and maintenance of space habitats significantly more accessible.

Current Testing and Future Timeline

While a full-scale space elevator reaching 60,000 miles above the Earth remains a project for the future, JAXA is already conducting preliminary tests. Researchers at Shizuka University are working on a prototype system using two mini-satellites connected by a 10-meter cable. These satellites are designed to move a "mini elevator car about the size of a matchbox" back and forth, allowing scientists to study how such a mechanism functions in low-gravity situations.

Although the prospect of a functional space elevator is exciting, the hosts note that it is a long-term endeavor, with researchers predicting it could be operational by 2050. Despite the long wait, the episode highlights the importance of these experimental engineering feats, emphasizing that while the technology is still in its infancy, it represents a monumental leap in how we think about space travel.

Ultimately, as Mindy and Guy Raz conclude, the project is a testament to human curiosity and the desire to push boundaries. From the humble, albeit strange, world of elevator music to the high-tech aspirations of Japanese aerospace engineers, the dream of an "interstellavator" remains a powerful symbol of our collective progress toward the stars.

🎯Key Sentences

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I think Thomas Fingerling signed me up.
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Guess I'll go wait out by the mailbox.
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There's no right or wrong way to enjoy the Pokemon trading card game.
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And for the parents, Oli has your back, too.
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This is the show where we chit -chat and answer questions from our fans
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📝Key Phrases

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make a breeze
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have your back
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gear up to
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stack up against
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catch them all
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📖 Transcript

Grown -ups, Wondery Plus subscribers can listen to Wow in the World early and ad -free right now.
Join Wondery Plus in the Wondery app or Wondery Kids Plus on Apple Podcasts.
Hey, Wowser fams. Mindy here.
And before we start the show...
Oh, hey, Reg. What's that?
A new pigeon dropping?

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