Cosmic Billiards Leads to Inner Planetary Growth

The inner planets of our solar system may have collided with the material of their building blocks more than once to build up to their current size.

IMAGE: Artist’s illustration of two massive objects colliding. CREDIT: NASA/JPL-Caltech

In the world of planetary formation, it feels like every week brings new unknowns as often as solved mysteries.



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Beth Johnson

Planetary scientist, podcast host. Communication specialist for SETI Institute and Planetary Science Institute. Buy me a coffee: