Rogue exoplanet or failed star? James Webb Space Telescope looks into a new cosmic case

Astronomers have used the James Webb Space Telescope to investigate the atmosphere of a cosmic body that is either a "failed star" brown dwarf or a rogue planet.

https://www.space.com/the-universe/rogue-exoplanet-or-failed-star-james-webb-space-telescope-looks-into-a-new-cosmic-case