
Around a neighboring star just 635 light-years away, astronomers have found even more evidence of a moon absolutely livid with volcanoes.
There is a giant cloud of sodium consistent with volcanic activity, orbiting an exoplanet named WASP-49b, orbiting in turn a yellow dwarf star named WASP-49.
And how do we know that the sodium is from an exomoon? The exoplanet is a gas giant, unlikely to host volcanoes – and the sodium cloud is out of sync with the exoplanet’s orbit, but exactly what we might expect if WASP-49b had a rocky volcanic moon.
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