Discovery of WISPIT 2c: Astronomers Witness the Birth of a Multi-Planetary System

On March 24, 2026, the scientific community celebrated a landmark achievement in astrophysics as researchers officially confirmed the existence of a second planet taking shape around the young star WISPIT 2. This newly identified protoplanet, designated WISPIT 2c, marks a significant milestone in our understanding of cosmic evolution. The WISPIT 2 system now joins PDS 70 as one of only two known stellar environments where the simultaneous formation of multiple planets has been directly observed. This groundbreaking study, which appeared in The Astrophysical Journal Letters, provides a rare, real-time glimpse into the chaotic infancy of a planetary system, serving as a modern-day mirror to the early developmental stages of our own Solar System.

The discovery builds upon the previous identification of WISPIT 2b, a massive gas giant nearly five times the size of Jupiter, which was first spotted in 2025. Its newly confirmed sibling, WISPIT 2c, orbits significantly closer to the host star—approximately four times nearer than its predecessor. Despite its closer proximity, WISPIT 2c is a formidable celestial body, with an estimated mass ranging between 8 and 12 times that of Jupiter. Both of these nascent worlds are classified as gas giants, residing within a system that is remarkably young, with an estimated age of only 5 million years.

Chloe Lawlor, a doctoral researcher at the University of Galway and the study's primary author, emphasized the unique value of this discovery. She noted that WISPIT 2 currently offers the most detailed and comprehensive view of the processes that likely shaped our own planetary neighborhood billions of years ago. The system acts as a natural laboratory, allowing scientists to test models of planetary genesis that were previously purely theoretical. By observing these giants in their nursery, astronomers can better understand the gravitational interactions and material accumulation required to build large-scale worlds.

What sets the WISPIT 2 system apart from others, such as PDS 70, is its exceptionally large and intricately structured protoplanetary disk. This disk is characterized by prominent gaps and concentric rings, which are the visible footprints of the planets as they vacuum up gas and dust from their surroundings. To capture these elusive details, the research team utilized the cutting-edge technology of the European Southern Observatory (ESO). Specifically, they employed the SPHERE spectrograph on the Very Large Telescope (VLT) and the upgraded GRAVITY+ instrument on the VLT Interferometer (VLTI). The enhanced sensitivity of GRAVITY+ was particularly vital, as it allowed the team to distinguish the faint signal of WISPIT 2c from the overwhelming glare of its parent star.

The spatial arrangement of the system is equally fascinating. While WISPIT 2b maintains a distant orbit at roughly 57 astronomical units (AU) from the star, WISPIT 2c is positioned much closer, at approximately 14 AU. Spectral analysis of the inner planet has already revealed the presence of carbon monoxide, a chemical signature typically associated with young, actively forming gas giants. The central star itself, located about 437 light-years from Earth, possesses a mass of 1.08 solar masses. It is currently in a pre-main sequence phase, meaning it has not yet begun the steady hydrogen fusion that defines mature stars like our Sun.

Intriguingly, the data suggests that the WISPIT 2 family may be even larger than currently confirmed. Researchers have noted a smaller, shallower gap in the outer regions of the disk, which hints at the presence of a third celestial body. Preliminary estimates suggest this hypothetical object could be similar in mass to Saturn. While it remains unconfirmed for now, the astronomical community is looking forward to the year 2030. The scheduled commissioning of the Extremely Large Telescope (ELT) is expected to provide the resolution necessary to directly image this third candidate, potentially adding another chapter to the system's story.

This international effort was spearheaded by a diverse team of experts, including scientists from the Leiden Observatory in the Netherlands and the Max Planck Institute for Extraterrestrial Physics in Germany. Their success highlights the incredible precision of modern ground-based instrumentation in resolving the dynamic, high-speed processes occurring in distant star systems. The observations of WISPIT 2 provide robust empirical evidence that gas giants can indeed form on wide, expansive orbits, reinforcing earlier theories regarding WISPIT 2b. Ultimately, this research is fundamental to refining our understanding of how giant planets grow and how planetary systems, including our own, evolve from swirling clouds of dust into complex orbital architectures.