James Webb reveals why planet formation is a race against time

JWST revealed that young planetary systems lose their planet-building gas through a changing mix of powerful jets, molecular winds, and radiation-driven outflows. As the disks age and their gas disappears, giant planets face a shrinking window to build massive atmospheres. James Webb reveals why planet formation is a race against time.

James Webb reveals why planet formation is a race against time Science News from research organizations James Webb reveals why planet formation is a race against time JWST reveals that newborn planets are racing against powerful winds and radiation before their supply of planet-building gas disappears. Com Planets take shape inside disks of gas and dust surrounding young stars, but the supply of gas they depend on is temporary. New observations from NASA’s James Webb Space Telescope (JWST) are giving astronomers a clearer picture of how that gas escapes and how the dominant escape mechanisms change as planetary systems mature.

The study, led by Naman Bajaj of the University of Arizona and coauthored by SETI Institute scientist Uma Gorti, examined 72 young, Sun-like stars and their protoplanetary disks. It is among the largest studies of planet formation conducted with JWST and suggests that different kinds of winds dominate at different stages of a system’s early development. The findings have been published in The Astronomical Journal.

Planet Formation Has a Deadline "What is exciting about this study is that we can now see, across a large sample of young systems, how the mechanisms that remove gas from planet-forming disks change with time.