New Star Wars-Like Planet Candidates with Two Suns Discovered

Key Takeaways

• 27 circumbinary planet candidates found using apsidal precession method
• Candidates span 650 to 18,000 light‑years, masses from Neptune to 10 Jupiter
• Detection rate ~2 % of 1,590 binary systems surveyed
• Method could reveal thousands more planets in upcoming LSST survey

Pulse Analysis

The breakthrough stems from repurposing apsidal precession—a technique once reserved for characterising binary star orbits—to hunt for planets. By monitoring minute variations in eclipse timing captured by NASA’s Transiting Exoplanet Survey Satellite, researchers can infer the presence of a third body without requiring a direct transit. This sidesteps the geometric bias of the traditional transit method, which only spots planets that cross the star‑disk from Earth’s viewpoint, and enables the detection of planets on inclined or eccentric orbits that would otherwise remain hidden.

The 27 candidates represent just the tip of an iceberg. With a 2 % occurrence rate among 1,590 examined binaries, extrapolations suggest tens of thousands of circumbinary worlds could be lurking in the Milky Way. Upcoming data from the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) will dramatically expand the searchable sample, potentially confirming thousands of additional planets. Beyond sheer numbers, these systems offer unique laboratories for studying planet formation under the complex gravitational dynamics of two suns, raising fresh questions about habitability and atmospheric evolution in environments far removed from our solar system.

For the scientific community, the method signals a paradigm shift in exoplanet discovery. It empowers astronomers to probe a broader swath of the galaxy, refine statistical models of planetary demographics, and prioritize follow‑up observations with facilities like the Anglo‑Australian Telescope. As the UNSW team moves to spectroscopically verify the candidates, the approach could soon detect Earth‑sized bodies, bringing us closer to answering whether life‑supporting worlds exist around binary stars—a prospect that could redefine our understanding of where life might arise in the cosmos.