This may be the first known exoplanet with rain and clouds of water droplets

Two teams have detected signs that K2 18b has a damp atmosphere

Exoplanet K2 18b

Exoplanet K2 18b, shown in the foreground of this artist’s impression, may be the first temperate planet in another star system found with a watery atmosphere, and perhaps even clouds and rain.

M. Kornmesser, Hubble/ESA

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