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TRAPPIST-1 Planets: Moons Possible, Size and Proximity Key

12/31/2025

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Summary

Story summary

Moons could exist around the TRAPPIST-1 system's seven Earth-sized planets, but only if they are small and remain close to their hosts.
New simulations show that larger moons would be pulled inward by tidal forces over billions of years.
The findings indicate that the close planetary packing does not rule out moons, but survival depends on their size and proximity.
Detection of such moons remains beyond current technology.

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Story summary

Moons could exist around the TRAPPIST-1 system's seven Earth-sized planets, but only if they are small and remain close to their hosts.
New simulations show that larger moons would be pulled inward by tidal forces over billions of years.
The findings indicate that the close planetary packing does not rule out moons, but survival depends on their size and proximity.
Detection of such moons remains beyond current technology.