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[Cosmic Time Travelers: Unraveling the Mysteries of the Big Bang and Gravitational Waves]-[BANG! Where'd this universe come from?! (Encore - 10/8/18)]

Wow in the World · B1 · 2018-10-08

Preschool Enlightenment
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📋 Summary

Cosmic Time Travelers: Unraveling the Mysteries of the Big Bang and Gravitational Waves

In this episode of Wow in the World, hosts Mindy and Guy Raz embark on an educational journey to explore the origins of our universe, the nature of space-time, and the groundbreaking scientific discovery of gravitational waves.

The Cosmos as a Time Machine

The episode begins with Mindy stargazing through a telescope, leading to a discussion about the vastness of the universe. Guy Raz introduces the concept of being a "time traveler" simply by observing the night sky. He explains that because light takes time to travel through space, looking at stars like Proxima Centauri—which is about 4.2 light years away—means we are seeing the star as it appeared years ago. As Guy Raz notes, "You are looking at history happen right before your eyes," effectively making every observer on Earth a "certified organic... time traveler."

Understanding the Big Bang

Transitioning to the origins of existence, the hosts discuss "cosmology," the scientific study of the universe. They touch upon the Big Bang, the theory describing the "very, very, very beginnings of our universe." Guy Raz describes how, approximately 13.8 billion years ago, intense energy, heat, and pressure began to expand, eventually forming the stars, planets, and galaxies we see today. The hosts emphasize that this was not a traditional explosion, but rather the rapid expansion of the universe itself.

Gravitational Waves: The Ripples of Space

To explain more complex physics, the duo utilizes a metaphor involving a trampoline and a bowling ball. Guy Raz compares the fabric of space-time to a trampoline; just as a heavy object creates movement at the edge of a trampoline, massive events in the cosmos create ripples known as "gravitational waves."

These waves were famously predicted by Albert Einstein. While Einstein could not prove the theory during his lifetime, modern astrophysicists confirmed it in 2017. On August 17, 2017, scientists detected a gravitational wave caused by the collision of two neutron stars 130 million light-years away—an event referred to as a "kilonova." This explosion was so powerful that it produced "1,000 trillion tons of gold" and, as the hosts jokingly suggest, momentarily "stretched and squished" every human on Earth, providing tangible evidence of the violent, creative forces at work in the deep cosmos.

Conclusion

Through a blend of humor and scientific inquiry, the episode demystifies complex concepts for younger listeners. By connecting everyday experiences—like watching ripples in a birdbath—to the monumental events of the early universe, Mindy and Guy Raz highlight the wonders of modern astrophysics. The episode concludes by encouraging listeners to stay curious about the "mysteries of our universe," reminding their audience that science is an ongoing, evolving journey of discovery.

🎯Key Sentences

1
Mindy, what in the world are you doing?
2
Guy Raz, are you talking about those sweet sounds you just heard?
3
That's not what I was asking for.
4
Can I just get some peace and quiet here?
5
I guess I'll send the band home.
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📝Key Phrases

1
music to your ears
2
take away from
3
make a racket
4
pack it in
5
hit the nail on the head
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📖 Transcript

Grownups, 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, Wowzer fans, Mindy here.
And before we start the show, I gotta let you know that this November, with a special new episode featuring our friends at Circle Round and Terrestrials on Radiolab for Kids,
And don't miss when Elmo from Sesame Street stops by Wow in the World to make us all belly laugh on November 24th.
Oh, but that's not all, Reg.

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