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A Protoplanetary Disk That Refuses to Grow Up
When young stars form, they accumulate an accretion disk of gas and dust, which eventually forms planets. Typically, this process lasts less than 10 million years, as the increasing radiation from the star disperses the remaining material. However, recent observations from the James Webb Space Telescope have revealed a protoplanetary disk in a system estimated to be 30 million years old—three times longer than the expected lifespan. Scientists have already determined this is not a debris disk created by colliding planets, it’s an intriguing discovery that has forced a review of our model of planetary system and stellar evolution.
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