Planets form from disks of gas and dust surrounding young stars, but the gas needed for their growth is available only for a limited time.
Observations with the James Webb Space Telescope
The telescope has captured infrared signals from several protoplanetary disks, revealing streams of cold gas flowing outward from the disk. The data indicate that the gas does not simply evaporate uniformly; instead, it leaves in structured outflows.
Implications for planet formation
These outflows suggest that the reservoir of material dwindles faster than earlier models predicted. Consequently, forming planets have less time to build cores and accrete gas, which may limit the final mass of giant planets.
Outlook
Future observations will map these outflows in greater detail and examine how they change with stellar age. The findings will help refine theoretical models of planet formation and improve our understanding of the observed diversity of exoplanets.