The James Webb Space Telescope (JWST) is aweing scientists and the public alike with its spectacular images of distant galaxies and its discoveries of dozens of new black holes. Yet JWST is also rewriting scientists’ understanding of objects on a slightly smaller, more relatable scale: how planets form from swirls of gas and dust around young stars. Such ‘protoplanetary’ disks are what the environs of the Sun would have been like 4.6 billion years ago, with planets coalescing from the whirling material around an infant star.
JWST is revealing how water is delivered to rocky planets taking shape in such disks. It’s providing clues to the exotic chemistry in these planetary nurseries. And it has even found fresh evidence for a cosmic hit-and-run in one of the most famous debris disks, encircling the star Beta Pictoris.
The telescope is delivering a cascade of insights about the ‘protoplanetary’ disks where planets take shape.