The most massive is Sagittarius B2, which is just a few hundred light-years from our the galaxy's central black hole (called Sagittarius A*). Cue the James Webb Space Telescope (JWST), which recently observed Sagittarius B2 in two wavelengths of light to help astronomers find out why. This breathtaking new image (above) of the molecular cloud comes from the JWST's Near-Infrared Camera (NIRCam). Webb’s MIRI (Mid-Infrared Instrument) shows the Sagittarius B2 (Sgr B2) region in mid-infrared light, with warm dust glowing brightly. (Image credit: NASA, ESA, CSA, STScI, A. Ginsburg (University of Florida), N. Budaiev (University of Florida), T. Yoo (University of Florida).