Astronomers using the Atacama Large Millimeter/submillimeter Array observatory in Chile have captured the first direct images of swirling gas falling onto WISPIT 2b, a still-growing exoplanet located 430 light-years from Earth. The observation marks the first time researchers have simultaneously viewed a protoplanetary disk, evidence of planetary growth, and the specific gas flows feeding a newborn world in a single system.
Two developing planets shape the WISPIT 2 disk
The WISPIT 2 system consists of two stars orbiting closely together, surrounded by a protoplanetary disk of rotating material. Within this disk, astronomers discovered two developing planets. The outer companion, WISPIT 2b, has a mass five times that of Jupiter and orbits at a distance roughly twice as far as Neptune sits from our sun. By sweeping up surrounding material as it grows, WISPIT 2b has carved a distinct gap in the disk. Its sibling, WISPIT 2c, has cleared a smaller internal cavity.
“We clearly see both planets shaping their environment,” Myriam Benisty, lead author from the Max Planck Institute for Astronomy, said in a statement. “Around WISPIT 2b, we find swirls of gas that had been predicted by simulations of disk-planet interactions, but never actually seen before. Now there is an image of them.”
Resolving Disk Swirls at 430 Light-Years
The detected swirls of gas appear as a modest cluster of pixels in telescopic imaging, yet they represent a massive leap in spatial resolution for observational astronomy. Researchers note that capturing this level of detail at a distance of over 400 light-years is comparable to reading a book three miles away.
However, interpreting these disk features remains complex. Similar gas swirls appear in other young star systems that currently lack detected planets. Astronomers debate whether these patterns invariably signal planet formation or simply arise within particularly turbulent disks without an accompanying world.
Upcoming telescopes will resolve disk morphology debates
Resolving the debate over disk morphology requires deeper imaging capabilities directed closer to host stars. Stefano Facchini, leader of the ALMA observation proposal, stated that upcoming observations aim to teach astronomers how to definitively distinguish between disk features created by protoplanets and those driven by other mechanisms.
Researchers plan to target regions much closer to the central star than WISPIT 2b using upcoming instruments. These include planned upgrades to the ALMA observatory, alongside next-generation ground-based facilities such as the Extremely Large Telescope and the Giant Magellan Telescope.
The findings have been accepted for publication in The Astrophysical Journal Letters and are currently accessible on the ArXiv preprint server.
Frequently Asked Questions About WISPIT 2b
How far away is the WISPIT 2 system?
The system is located 430 light-years from Earth. It contains a tight binary star pair surrounded by a protoplanetary disk.
When was the WISPIT 2b planet discovered?
Astronomers discovered WISPIT 2b in 2025. It possesses five times the mass of Jupiter and orbits far out in the system’s disk.
What telescope captured the swirling gas images?
The Atacama Large Millimeter/submillimeter Array observatory in Chile captured the data. The research team detailed their findings in a paper accepted by The Astrophysical Journal Letters.