Artist's impression of the cold brown dwarf BDR J1750+3809 (IMAGE)
Caption
Artist's impression of the cold brown dwarf BDR J1750+3809. The blue loops depict the magnetic field lines. Charged particles moving along these lines emit radio waves that LOFAR detected. Some particles eventually reach the poles and generate aurorae similar to the northern lights on Earth.
Credit
ASTRON/Danielle Futselaar
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