AaS! 242: Are There Invisible Stars in the Universe?
Ask a Spaceman!
Paul M. Sutter
4.8 • 853 Ratings
🗓️ 18 February 2025
⏱️ 36 minutes
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Summary
What is an axion? How could axions make a star, and what does that have to do with dark matter? What would these stars look like? I discuss these questions and more in today’s Ask a Spaceman!
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Transcript
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| 0:00.0 | Sometimes on a quiet, dark night, I love to look up at the stars and wonder what I'm not seeing. |
| 0:19.0 | What's beyond the stars and what's between them? |
| 0:23.5 | The galaxy is too far for the naked eye. |
| 0:25.8 | The red dwarfs and rogue planets and black holes lurking in the depths. |
| 0:30.7 | And I wonder if there's something more. |
| 0:34.0 | Something even more hidden. |
| 0:36.2 | More mysterious. |
| 0:37.8 | I wonder that if when I look at a blank patch of night sky and I look at a point right |
| 0:44.9 | between the stars, I wonder if I am looking directly at something without even realizing |
| 0:53.9 | it. |
| 0:54.3 | And I need to start out this episode with the usual dark matter disclaimer. |
| 0:59.7 | We have no idea what's going on. |
| 1:02.0 | I mean, we have some idea what's going on. |
| 1:04.6 | I've done episodes on Dark Matter before, so I'm not going to belabor the point. |
| 1:09.6 | But the gist is that something funny is definitely going on with mass in the universe. |
| 1:15.1 | We strongly, strongly, all caps strongly believe that there is a huge component to the universe |
| 1:20.8 | that is some kind of particle, currently unknown to physics, |
| 1:26.8 | and that this particle is both A, abundant, and B, |
| 1:31.3 | nearly, if not completely invisible. |
| 1:34.3 | Uh, that's about it. |
| 1:35.3 | There are a lot of finer details that aren't super important right now, that that's it. |
| 1:40.3 | We strongly believe that dark matter exists and it is some form of particle. |
... |
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