Astronomy Cast Full Raw Feed · Fraser Cain & Dr. Pamela L. Gay

Ep. 747: Rogue Planets

·1 hr 5 min·5 clips
Astronomers found two Jupiter-sized planets orbiting each other in deep space, with a shocking explanation for how they formed.
Fraser Cain and Dr. Pamela Gay discuss rogue planets—free-floating worlds discovered via microlensing and JWST, including binary Jupiter-mass objects. They explore theories of formation, potential for life, and their abundance in the Milky Way. The episode also covers Fraser's transition of Universe Today to an ad-free, patron-funded model amid a media industry crisis.

As heard by us

A loose opening gives way to a sharp puzzle about starless planets, binary pairs, and how they were kicked free.

The episode turns rogue planets into a clear detective story, tracing how starless objects are found, why some seem to travel in pairs, and how violent three-body encounters may have flung them out in the first place.

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Why you'd press play

You want a fast read on why some planets drift alone.

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