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Secrets of the Universe: What Happened Before The Big Bang, Life Across the Galaxy, Surviving a Black Hole & How We’re All Made of Stars | Astrophysicist Janna Levin

Mayim Bialik's Breakdown

00:00

Why Planets Are Round and Differ

Janna describes gravity-driven rounding, planet composition differences, and why inner rocky versus outer gas giants form.

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