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Ask a Spaceman!

AaS! 79: Seriously, what is gravity? (Part 3)

Ask a Spaceman!

Paul M. Sutter

Astrophysics, Science, Cosmos, Holes, Black, Astronomy, Natural Sciences, Universe, Cosmology, Space, Physics

4.8853 Ratings

🗓️ 1 May 2018

⏱️ 42 minutes

🧾️ Download transcript

Summary

Part 3! How did Einstein develop General Relativity? What does it mean for different kinds of masses to be equivalent? How does gravity do what it does? Why is curvature so important in understanding gravity? I discuss these questions and more in today’s Ask a Spaceman!

Support the show: http://www.patreon.com/pmsutter
All episodes: http://www.AskASpaceman.com

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Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE!

Big thanks to my top Patreon supporters this month: Robert R., Justin G., Matthew K., Kevin O., Chris C., Helge B., Tim R., Steve P., Lars H., Khaled T., Chris L., John F., Craig B., Mark R., and David B.!

Music by Jason Grady and Nick Bain. Thanks to WCBE Radio for hosting the recording session, Greg Mobius for producing, and Cathy Rinella for editing.

Hosted by Paul M. Sutter, astrophysicist at The Ohio State University, Chief Scientist at COSI Science Center, and the one and only Agent to the Stars (http://www.pmsutter.com).

Transcript

Click on a timestamp to play from that location

0:00.0

I swear I'm going to finish in this episode, no matter how long it takes.

0:12.2

Even if this episode is three and a half hours long, I'm going the distance because this is

0:18.4

getting ridiculous.

0:19.9

Part three, by the way, if you're just now joining the adventures, this is part three of a

0:26.4

planned two-part series, but turned into a three-part series on general relativity, our

0:31.8

modern conception of general relativity.

0:35.2

And I know, and I'm about to repeat myself again,

0:39.1

I've repeated myself a lot in these past two episodes,

0:42.9

and I'm taking it slow.

0:44.5

I'm really digging into the juicy details.

0:46.3

I'm taking the roundabouts.

0:47.7

I'm taking the backcountry roads in this.

0:51.1

I'm not taking the freeway.

0:52.4

No, I pulled off a long time ago and I'm taking the little

0:55.9

unmarked, barely two lane road back through the backwood to this journey because it's such a rich,

1:04.8

juicy topic and such a complex topic and general relativity is so easy to say, but it's another thing completely to really

1:12.8

understand it. So I want us to just soak in this. I want us to take a bath in Einstein's brain

1:19.5

and just let it soak into our skin so that we can get a hint of the understanding of this

1:25.8

magnificent, beautiful contraption that we use to understand gravity

1:30.7

in our universe.

1:32.0

And it's been an incredible journey, hasn't it?

1:35.1

If you haven't listened to Parts 1 and 2, I strongly suggest you go and do that right now.

...

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