Webb Telescope Discovered a Cosmic Dust Mill express
Astrophysicists have discovered a distant quasar—a supermassive black hole at the center of a galaxy—with an unusual ultraviolet absorption pattern, pointing to an abundance of the tiniest silicate dust grains. Powerful shock waves and outflows from the quasar are likely shattering larger dust particles or triggering the birth of new, smaller ones. These objects may have played a pivotal role in the rapid dust buildup in the early universe, supplying the cosmic ‘construction material’ needed for grain growth and enriching the intergalactic medium.
Using the James Webb telescope, astronomers peered into an ancient quasar—the dazzling heart of a galaxy where a giant black hole sucks in matter. It turns out it doesn't just destroy, but also creates: its powerful outflows and shock waves act like a true cosmic mill. They grind cosmic dust particles into the finest powder—just like ordinary sand, but pulverized to microscopic sizes.
And here's an unexpected twist: the telescope didn't spot the characteristic spectral feature that gives away carbon dust—which is almost everywhere. It seems this mill is selective: it only processes silicates, ignoring carbon.
🎯 The light from this quasar traveled 12.5 billion years to reach the telescope. We see it as it was just 1.3 billion years after the Big Bang.