4.8 • 853 Ratings
🗓️ 16 October 2018
⏱️ 34 minutes
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What do brown dwarfs teach us about stars? What do they teach us about planets? What keeps them warm, and how long do they live? And are they really brown? 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).
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0:00.0 | So I was putting together my notes today for this episode, which is all about |
0:10.6 | Brown dwarfs, by the way. |
0:12.0 | And I was reading journal articles and news stories, all the usual stuff to make an |
0:16.6 | episode. |
0:17.0 | And one word kept popping into my mind over and over and over and over again. |
0:25.9 | That word is weird. |
0:29.0 | Brown dwarfs are just weird. |
0:32.9 | The short version of brown dwarfs, and we're about to get into the long version, trust me. |
0:36.5 | The short version is they're too big to be a planet, but too small to be a star. And you might think |
0:44.0 | that such a thing wouldn't even exist. That's like the first weird thing, is that brown dwarfs |
0:50.4 | are a category unto themselves. You might think you have planets over here and you have |
0:55.7 | stars over there. And if you start making a planet bigger, you would just have a large planet. |
1:02.3 | And at some point, surprise, instead of a planet, you have a star. You just have a small star and |
1:07.2 | then you go up to start building big stars. But no. |
1:16.4 | Sadly, nature is much more complicated than we would prefer, or maybe we do prefer it because then we get to keep having jobs as astrophysicist. |
1:19.2 | But either way, brown dwarfs are indeed a thing all on their own. |
1:25.7 | And not only are they their own identity, their own class of astronomical |
1:30.8 | object, they have their own subclassifications because, man, just one category just isn't |
1:38.0 | confusing enough. So we need to admit it. We need to get out front. We might argue about the |
1:42.6 | nature of brown dwarfs. we might try to lump them in |
1:44.9 | as planets or lump them in as stars but they're not there neither they aren't going away and they |
1:52.4 | are weird in this weirdness this weird nature of brown dwarfs comes from a question. A couple questions. We have these things, |
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