Webb's IC 348 mosaic includes two-Jupiter dwarfs, twin jets, and a nursery

NASA published one of the James Webb's largest mosaics — the IC 348 star-forming region 1,000 light-years from Earth, spanning 16×20 arcminutes. It revealed record-light brown dwarfs of about two Jupiter masses (0.19% of the Sun's mass), one of them surrounded by a disk.

• IC 348 mosaic captured by NIRCam on August 30, 2024 in F162M, F182M, F360M, F444W
• Lightest objects weigh about 2 Jupiter masses — 0.19% of the Sun's mass
• One dwarf has a disk where planets may form
• Spectra show traces of an unidentified hydrocarbon — possibly a new spectral class