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Rogue planet

Rogue planet

Search complete. 17 mentions across 2 episodes found for "Rogue planet".

Oct 6, 2026

JoeHOST
9:34
Yeah.
SenanHOST
9:35
Um, and then finally there is the specter, the scary specter of something called rogue planets that we've discovered.
SenanHOST
9:41
So these are a particular type of exoplanet that, uh, could be dangerous, but, uh, we'll come back to that.
SenanHOST
9:46
[laughs]

13 MINS LATER

JoeHOST
23:03
Yeah.
SenanHOST
23:03
Um, so tho- those are the ones that are in the Goldilocks zone, and we have tended to focus on that because, you know, wouldn't it be wonderful to be, to find another planet with life on it or somewhere we could live after we wreck this one? So yeah, tha- tha- there's a focus on that, and in fact, uh, uh, there's a, there's a, a, a specific satellite that's launching in a few years' time that will look f- uh, at those more closely, the ones that we think are in the Goldilocks zone.
SenanHOST
23:26
So let's, let's get back to these rogue planets.
SenanHOST
23:28
So these are ones that don't have a star of their own.
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63:52
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Alex McColganHOST
63:58
Rogue planets are one of the great mysteries left in the universe.
Alex McColganHOST
64:03
They are planetary-sized objects that are not gravitationally bound to a star.
Alex McColganHOST
64:08
We don't fully understand how they formed.
Alex McColganHOST
64:12
Perhaps they were born in a planetary system, but got ejected during the system's turbulent beginnings.
Alex McColganHOST
64:18
Following that thought, perhaps our own solar system also had additional planets at the beginning before they were cast away to forever roam the galaxy alone.
Alex McColganHOST
64:28
Rogue planets could also be protostars that simply failed to absorb the mass needed to become a star, or even a brown dwarf.
Alex McColganHOST
64:37
We expect there to be billions to trillions of them out there in just our galaxy alone, although because they are hard to detect, this really is an educated guess at best.

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