James Webb Space Telescope reveals thick cosmic dust of Sagittarius B2, the most most enormous star-forming cloud in the Milky Way — Space photo of the week

Why it’s so special: Stars in the Milky Way galaxy are born in huge molecular clouds. 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*). This black hole is much more bountiful than you might first think — it has 10% of the galactic center’s gas, but accounts for about half of the region’s ongoing star formation. Why star formation is so disproportionate within the galactic center region is a conundrum for scientists.

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). In it, we see stars shine brightly between orange clouds of gas and dust shining in near-infrared light.

However, even within the infrared spectrum, the difference in what can be seen is considerable, as proven by another image of the cloud by the JWST’s Mid-Infrared Instrument (MIRI).

The MIRI image is entirely different, revealing the region’s dust clouds illuminated by its stars. It shows pink and purple clouds surrounded by very dark regions studded with stars. The JWST cannot see everything:. Even its infrared vision can’t penetrate the densest clouds, which remain dark and opaque in the MIRI image. Within those regions, hidden from view, are the raw ingredients for stars.