Methane emission from a cool brown dwarf - Nature
Briefly

Brown dwarfs, particularly Y dwarfs, are comparable to Jupiter in temperature and are best studied with space-based telescopes like JWST due to their faintness and need for infrared instrumentation.
Observations of two brown dwarfs using JWST revealed that their luminosity ratio to the Sun were nearly identical within uncertainties, indicating their potential for further in-depth study.
Read at Nature
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