With its three planets orbiting two suns, Kepler-47 is the only known multi-planet circumbinary system. Circumbinary planets are those that orbit two stars.

The planets in the Kepler-47 system were detected via the "transit method." If the orbital plane of the planet is aligned edge-on as seen from Earth, the planet can pass in front of the host stars ...

The entire Kepler-47 system itself is interesting as well. With two suns, it's the only known multi-planet circumbinary system. The system is extremely compact and would fit inside the orbit of Earth.

Kepler-47 is a roughly 3.5-billion-year-old system located 3,340 light-years from Earth. One of its stars is quite sunlike, but the other is considerably smaller, harboring just one-third the mass ...

All three planets also have a lower density than Saturn, our solar system’s least dense planet. Kepler 47 is roughly 3340 light-years from Earth toward the northern constellation Cygnus.

Additionally, the fact that Kepler-47d is the largest planet in the entire system came off as a surprise to researchers. "We certainly didn't expect it to be the largest planet in the system.

This is an artist's rendition of the Kepler-47 system. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or ...

All three planets also have a lower density than Saturn, our solar system's least dense planet. Kepler 47 is roughly 3340 light-years from Earth toward the northern constellation Cygnus.

Kepler-47d is the largest of the three planets in the Kepler-47 system. "We saw a hint of a third planet back in 2012, but with only one transit we needed more data to be sure," said SDSU ...

William Welsh, SDSU astronomer and the study’s co-author, said he and Orosz expected any additional planets in the Kepler-47 system to be orbiting exterior to the previously known planets.