Jupiter's moon Io is the most Volcanically Active body in our solar system. Today, there are indications that an active moon outside our solar system, an exo-Io, could be hidden at the exoplanet system WASP-49b.
Artist's composition of a volcanic exo-Io undergoing extreme mass loss. The hidden exomoon is enshrouded
in an irradiated gas cloud shining in bright orange-yellow, as would be seen with a sodium filter.
Patches of sodium...
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