In a groundbreaking astronomical discovery, an international team of researchers has identified a second planet forming within the young star system known as WISPIT 2. This remarkable system, located in the constellation of the Eagle—an equatorial constellation visible from the northern hemisphere during summer months—has now been confirmed to host multiple young, still-forming gas giant planets. This discovery provides an unprecedented glimpse into the early stages of planetary system development, offering profound insights into the processes that shape worlds like our own.
The newly detected planet, designated WISPIT 2c, is estimated to be approximately five million years old—a mere infancy in cosmic terms—and boasts a mass roughly ten times that of Jupiter, the largest planet in our solar system. This gas giant’s formation environment is characterized by a multi-ringed disk of dust and gas encircling the star, a setting reminiscent of the early solar system. WISPIT 2c’s discovery complements the previously identified WISPIT 2b, discovered a year earlier by the same research consortium, thus marking WISPIT 2 as only the second known young system with multiple giant planets observed in formation concurrently.
The detection of WISPIT 2c was achieved through the use of the European Southern Observatory’s (ESO) Very Large Telescope Interferometer (VLTI), an advanced observational array situated in Chile’s Atacama Desert. By coherently combining the light collected from multiple eight-meter telescopes into a single virtual telescope, the VLTI attains a resolution unparalleled by conventional individual instruments. This synergy was paramount in isolating the faint signatures of the new planet from the overwhelming brightness of its host star, which outshines the planetary signals by factors of thousands.
One of the key breakthroughs in confirming the existence of WISPIT 2c came from spectroscopic analysis—specifically, the identification of carbon monoxide (CO) gas within the planet’s atmosphere. CO, a molecule prevalent in the atmospheres of giant planets, imprints distinct spectral lines that act as a chemical fingerprint. The presence of these signatures, obtained through high-resolution spectroscopy enabled by the GRAVITY+ instrument upgrade, provided compelling evidence that the detected signal originated from a protoplanet rather than a transient dust clump within the disk.
Lead PhD researcher Chloe Lawlor of the Centre for Astronomy at the University of Galway played an instrumental role in this discovery. Following the initial detection of WISPIT 2b, Lawlor suspected additional objects may exist within the complex disk structure. Employing the VLTI’s exquisite capabilities, her team was able to extract the spectral fingerprint of WISPIT 2c’s atmosphere. The moment CO signatures emerged in the data was met with surprise and excitement, marking a significant milestone not only for the research team but for the broader astronomical community. The chemical data allowed unequivocal discrimination between a planet and other disk phenomena, underscoring the importance of spectroscopic techniques in modern exoplanetary science.
The planet WISPIT 2c resides much closer to its star than its sibling planet WISPIT 2b, orbiting at roughly one-quarter of the latter’s distance. This proximity creates observational challenges; the intense stellar glare complicates direct detection, necessitating the sophisticated interferometric approach adhered to by the team. Their ability to differentiate such a faint signal adjacent to an immensely bright star exemplifies the forefront of observational astronomy technology. Such achievements highlight the rapid advancements in instrumentation and analysis methodologies that enable scientists to probe regions of space once thought inaccessible.
The discovery’s significance extends beyond mere cataloging of exoplanets. WISPIT 2’s system acts as a natural laboratory for studying the origins and early evolution of planetary systems. Given its young age and the presence of multiple gas giants still embedded within their natal disk, the system closely parallels theoretical models of the early solar system’s architecture. Observations of WISPIT 2c will allow researchers to test and refine simulations of planetary accretion, migration, and atmospheric formation under real astrophysical conditions, providing enhanced understanding of the processes that gave rise to Earth and its neighboring planets.
Professor Frances Fahy, Director of the Ryan Institute at the University of Galway, emphasized the broader impact of this discovery on the scientific community and public engagement. Such findings underscore the cutting-edge research conducted at academic institutions and illustrated how breakthroughs in astrophysics inspire emerging generations of scientists. By connecting developments in instrumentation, theory, and observational strategy, discoveries like WISPIT 2c catalyze a renewed enthusiasm for exploring our cosmic origins.
Dr. Christian Ginski, a key figure in the project and lecturer at the University of Galway, highlighted the transformative progress in exoplanetary science since the early days when the detection of any exoplanet was an exceptional challenge. Now, the ability to image and analyze planets forming in their disks affirms the extraordinary growth of the field. The collaborative effort across multiple institutions in Europe and beyond serves as a testament to international cooperation driving forward humanity’s quest to understand planetary genesis.
The researchers’ approach leveraged the recent enhancements made to the GRAVITY+ instrument—a spectro-interferometric facility that fuses light from all four of ESO’s 8-meter telescopes. This configuration of the VLTI enhances light-gathering power and spatial resolution, critical for distinguishing small-scale features near bright stars. The chemical analysis derived from this configuration allows astronomers to probe elemental compositions, atmospheric structures, and thermal properties of forming planets with unprecedented detail, opening new frontiers in exoplanetary characterization.
As WISPIT 2 continues to be monitored, astronomers anticipate further revelations regarding the dynamics of young planetary systems. The lessons learned from WISPIT 2c and its sibling planet will inform searches for other young multi-planet systems and clarify the multiplicity and diversity of planetary formation pathways. Such discoveries deepen our grasp of how common planetary systems like our own are in the galaxy, moving us closer to answering fundamental questions about the prevalence of potentially habitable worlds throughout the cosmos.
This seminal work was formally published in The Astrophysical Journal Letters and supported by the Ryan Institute at the University of Galway. It represents a significant step forward in our ability to study exoplanets at the earliest stages. The concerted effort harnessing the power of the ESO’s Very Large Telescope and cutting-edge spectro-interferometry firmly establishes WISPIT 2 as a canonical example for understanding complex planetary system formation—a process that ultimately shaped the environment in which life on Earth emerged.
Subject of Research: Not applicable
Article Title: Direct Spectroscopic Confirmation of the Young Embedded Protoplanet WISPIT 2c
News Publication Date: 24-Mar-2026
Web References:
Astrophysical Journal Letters Publication
References:
Lawlor, C., van Capelleveen, R.F., Bourdarot, G., Ginski, C., et al. (2026). Direct Spectroscopic Confirmation of the Young Embedded Protoplanet WISPIT 2c. The Astrophysical Journal Letters.
Image Credits:
ESO/C. Lawlor, R.F. van Capelleveen et al.
Keywords
Exoplanet formation, protoplanetary disks, gas giant planets, Very Large Telescope Interferometer, spectro-interferometry, carbon monoxide detection, young planetary systems, GRAVITY+, WISPIT 2, astronomical spectroscopy, planet formation, multi-planet systems
