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#89 Rogue planets! It's possible that most planets in our galaxy don't orbit a star, like we do with our sun. Rogue planets float through interstellar space in the cold darkness. How do they form? And how do we find a planet at interstellar distances? episode artwork

EPISODE · Mar 31, 2026 · 11 MIN

#89 Rogue planets! It's possible that most planets in our galaxy don't orbit a star, like we do with our sun. Rogue planets float through interstellar space in the cold darkness. How do they form? And how do we find a planet at interstellar distances?

from Cosmic Coffee Time with Andrew Prestage · host Andrew Prestage

Send us Fan MailWe instinctively think of planets as rocky or gaseous bodies orbiting a star like our sun, with sunrise, sunset, heating and maybe even seasons. But what if a planet didn't orbit a light source? What if it just floated through space vaguely orbiting the centre of the galaxy, but tugged this way and that way by nearby stars and stellar systems. These are rogue planets. No sunrise, no sunset, no heat from an outside source. Just starlight and blackness as it wandered aimlessly through lonely interstellar space. And they just might be the most common type of planet in our galaxy.Follow Cosmic Coffee Time on X for some special contentX.com/CosmicCoffTimeEmail us! [email protected] can request a topic for the show! Or even just say hi!We'd love to hear from you.

What this episode covers

Send us Fan Mail We instinctively think of planets as rocky or gaseous bodies orbiting a star like our sun, with sunrise, sunset, heating and maybe even seasons. But what if a planet didn't orbit a light source? What if it just floated through space vaguely orbiting the centre of the galaxy, but tugged this way and that way by nearby stars and stellar systems. These are rogue planets. No sunrise, no sunset, no heat from an outside source. Just starlight and blackness as it wandered aimlessly ...

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#89 Rogue planets! It's possible that most planets in our galaxy don't orbit a star, like we do with our sun. Rogue planets float through interstellar space in the cold darkness. How do they form? And how do we find a planet at interstellar distances?

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Frequently Asked Questions

How long is this episode of Cosmic Coffee Time with Andrew Prestage?

This episode is 11 minutes long.

When was this Cosmic Coffee Time with Andrew Prestage episode published?

This episode was published on March 31, 2026.

What is this episode about?

Send us Fan MailWe instinctively think of planets as rocky or gaseous bodies orbiting a star like our sun, with sunrise, sunset, heating and maybe even seasons. But what if a planet didn't orbit a light source? What if it just floated through space...

Can I download this Cosmic Coffee Time with Andrew Prestage episode?

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