Astronomers expected there to be hundreds of planets with two suns, but only 14 were discovered, and Einstein’s theory may explain why.

Planets orbiting two stars were expected to be everywhere. Instead, astronomers have discovered only a few, according to a new study. Einstein’s general theory of relativity We may be quietly wiping out many of them.

For years, this gap has puzzled scientists. The numbers simply didn’t add up, as binary stars are common in galaxies and planet formation is thought to occur frequently.

Observations from major missions such as Kepler and Tess I have confirmed the discrepancy. What seemed like a promising setting for discovering an exotic world turned over time into deeper questions about how gravity works.

Missing population around binary stars

Of the above 6,000 exoplanets have been confirmedonly 14 It orbits two stars. According to a study published in Astrophysics Journal Letterastronomers predicted hundreds based on how common both planets and binary stars are. Data makes that gap even clearer. Only Kepler specified about 3,000 eclipse binary star systems,still 47 planet candidates found in those environments. Only a handful have been confirmed.

There are also very specific blind spots. Binaries orbiting each other with less than 7 days No planets have been detected. According to researchers at the University of California, Berkeley Mohammad Farhatthis creates a real “desert” that appears to be completely devoid of planets.

“Typically, there are very few orbiting planets, and there are complete deserts around binary stars with orbits of seven days or less,” he says. “The vast majority of eclipsing binaries are tight binaries, and these are the systems we would most expect to find circumbinary stars passing around them.”

When Einstein appears

The explanation seems to come from a subtle effect. In these systems, both stars and planets undergo orbital shifts known as . precessionbut not for the same reason. As a team from University of California, Berkeley and American University of Beirut It is explained that the movement of stars is influenced by: general relativityespecially since tidal forces slowly bring them closer together. It causes their motion to accelerate, while the planet slows down.

At some point, the two movements synchronize in a phenomenon that scientists call resonance. That’s where the problem arises. The planet’s orbit continues to lengthen until it becomes unstable. as fur hat It is explained that planets are either pushed out of the system or pulled inward and lost. Simulation suggests almost 80% In such a close-knit star system, none of the planets can survive.

A zone that wipes everything out

There is another important part. instability zone. This is a region where a stable orbit around a binary star does not persist. Jihad Touma We explained that if a planet’s orbit stretches too far, it will drift into this zone.

“A planet caught in resonance deforms its orbit to become more and more eccentric, precessing faster and faster, keeping in tune with the orbit of the shrinking binary star,” Touma added.

Most of the orbiting planets we see are located just outside this boundary. That likely means they formed farther away, moved inward over time, and stopped just before conditions became unstable. Touma explains that when a planet forms near this region, it occurs as follows: “I was trying to stick snowflakes together in a hurricane.” That reflects how chaotic it is.

What this shows is that einstein’s theorywas first introduced in 1915 and continues to shape what we see in space today by removing entire planets before they can be detected.