A. New planets larger than Jupiter
B. Brown dwarfs about twice the mass of Jupiter
C. Supermassive black holes
D. Artificial satellites
In September 2026, the James Webb Space Telescope released a detailed view of the star-forming region IC 348. Astronomers studying this region discovered brown dwarfs with masses as low as about twice that of Jupiter.
Brown dwarfs are objects that are more massive than planets but generally not massive enough to sustain the nuclear fusion that powers ordinary stars. Finding such low-mass brown dwarfs helps scientists investigate the boundary between planets and stars and understand how these unusual objects form.