James Webb Space Telescope's 'shocking' discovery may hint at hidden exomoon around 'failed star'

An illustration of a brown dwarf with a ring of reddish auroral emissions at its north pole.

Using the James Webb Space Telescope (JWST), astronomers have made the surprising discovery of methane emissions coming from a brown dwarf, or "failed star."

The find suggests that the brown dwarf features aurorae, and might even be orbited by an undiscovered exomoon, researchers said.