Astronomers Unveil New Insights into Planet Formation Using SPAM

Researchers at the W. M. Keck Observatory in Maunakea, Hawaiʻi Island, have gained unprecedented insights into the formation of planets. Using advanced imaging techniques, they examined the dusty regions surrounding a young star, known as HD 34282, marking a significant step in understanding how planetary systems develop.

The study, which is part of a project called The Search for Protoplanets with Aperture Masking (SPAM), highlights the importance of examining protoplanetary disks. According to Christina Vides, a graduate student at the University of California Irvine and lead author of the research published in The Astrophysical Journal, “By studying systems like this, we can watch planet formation in action and learn what conditions give rise to worlds like our own.”

Detailed Observations of Planet Nurseries

The team utilized the Near-Infrared Camera (NIRC2) at the Keck Observatory, which enables astronomers to obtain clearer images closer to stars than traditional methods allow. HD 34282, located approximately 400 light-years from Earth, is surrounded by a dense ring of dust and gas, referred to as a “transition disk.” This structure is believed to be influenced by the gravitational effects of forming planets.

The observations revealed intricate clumpy structures and brightness patterns within the disk of HD 34282, suggesting potential planet-forming activity. Although the team did not detect any confirmed protoplanets, they were able to provide new constraints regarding where these young planets might be located. They also estimated the mass of the star and its accretion rate, both of which are crucial for understanding how the surrounding material could eventually form planets.

A Rare Opportunity to Understand Planetary Formation

Detecting protoplanets is a challenging task, with only two confirmed cases—PDS 70 b and PDS 70 c—previously imaged directly. Both of these protoplanets were identified in 2020 by researchers at Caltech using the same NIRC2 instrument. Each new observation offers further insights into the dynamics of planetary systems emerging from swirling disks of gas and dust.

“This work is pushing the boundaries of what we can see,” Vides noted. “Keck’s adaptive optics and masking capabilities make it possible to resolve features just a few astronomical units from the star—regions that are otherwise completely invisible.”

The team plans to continue its research, focusing on other young stars with promising disks and accumulating more data for the SPAM project. Furthermore, they are preparing for future observations with advanced instrumentation, such as SCALES, a next-generation high-contrast imager currently in development for the Keck Observatory.

Vides emphasized the importance of these ongoing studies: “Every new system we study helps us understand a little more about how planets form and evolve. It’s incredible that we can point a telescope at a young star hundreds of light-years away and actually see the conditions that could give rise to new worlds.”

For further details, refer to the study by Christina L. Vides et al. titled “NIRC2 Interferometric Imaging of the HD 34282 Transition Disk’s Small Grain Structure,” published in The Astrophysical Journal (2025). DOI: 10.3847/1538-4357/ae0932.