AaS! 61: Where do giant magnetic fields come from?
Ask a Spaceman!
Paul M. Sutter
4.8 • 853 Ratings
🗓️ 1 August 2017
⏱️ 30 minutes
🧾️ Download transcript
Summary
How does the universe generate giant magnetic fields? Is it astrophysical or primordial? How do we find them anyway? Why am I not talking about Maxwell? I discuss these questions and more in today’s Ask a Spaceman!
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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
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| 0:00.0 | You know what time it is. It's time for Ask a Space Man. I'm your host, Paul Sutter. You've got questions and I've got answers. You know how this show works. But let me wrap around it one more time. You go online to Twitter or Facebook. Use the hashtag Ask a Spaceman. |
| 0:22.0 | Send questions to me and I will send answers to you. Fair trade, I would say. You could also go |
| 0:27.2 | to the website, askas spaceman.com. Go to YouTube.com slash Paul M. Sutter. Note that is a |
| 0:32.9 | slightly different address than it used to be because YouTube, I don't want to talk about YouTube right now, |
| 0:38.7 | but it's just a different address. |
| 0:40.6 | YouTube.com slash Paul M. Sutter for all your Ask a Spaceman visual needs. |
| 0:46.5 | You can also follow me directly on Twitter and Facebook. |
| 0:48.9 | My name is at Paul Matt Sutter. |
| 0:51.0 | We have one simple goal with this show. |
| 0:56.6 | Complete knowledge of time and space. |
| 1:00.0 | And on the road to complete knowledge of time and space, we have today's questions. |
| 1:09.5 | We have Chris N. via email. How do galaxies get giant magnetic fields? And we have PE via email, how are magnetic fields detected in the universe? |
| 1:14.0 | By the way, before I really dig into the meat of this episode, if you want to be cool, |
| 1:19.1 | you can't call them magnetic fields. You have to call them B fields. That's right, B. The letter B |
| 1:25.7 | or a bumblebee, B fields. We have E fields is short for electrical fields. That's right, B, the letter B or a bumblebee, B fields. We have E Fields is short for |
| 1:31.3 | electric fields and M was already taken and B kind of rhymes so that's nice. So B fields, it is. I'm doing |
| 1:38.8 | this to save you from your own embarrassment. You know, I always have your best interest at heart. |
| 1:43.0 | I don't want you schmoozing at some |
| 1:44.8 | fancy pants, astronomy party, and you make a major faux pot by saying magnetic fields. That's way |
| 1:52.3 | too many syllables. Be cool. Say, B fields. Now, for the sake of clarity, I will break my own rule |
| 2:00.4 | temporarily, and I'm only doing this |
| 2:02.1 | because I like you. |
... |
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