Discovery of 3rd Planet in Kepler-47 System Orbiting Binary Stars


Cosmologists have found a third planet in the Kepler-47 system, verifying the system’s title as the most intriguing of the binary star worlds. Utilizing information from NASA’s Kepler space telescope, a group of specialists, driven by cosmologists at San Diego State University, distinguished the new Neptune-to-Saturn-measure planet circling between two recently known planets.

With its three planets circling two suns, Kepler-47 is the main known multi-planet circumbinary system. Circumbinary planets are those that circle two stars.

The planets in the Kepler-47 system were identified by means of the “transit method.” If the orbital plane of the planet is adjusted edge-on as observed from Earth, the planet can go before the host stars, prompting a quantifiable diminishing in the observed brightness. The new planet, named Kepler-47d, was not distinguished prior because of feeble transient signals.

As is regular with circumbinary planets, the arrangement of the orbital planes of the planets change with time. For this situation, the center planet’s circle has turned out to be progressively adjusted, prompting a more grounded transient signal. The transient profundity went from imperceptible toward the start of the Kepler Mission to the most profound of the three planets over the range of only four years.

The SDSU specialists were amazed by both the size and area of the new planet. Kepler-47d is the biggest of the three planets in the Kepler-47 system.


Jerome A. Orosz, William F. Welsh, Nader Haghighipour, Billy Quarles, Donald R. Short, Sean M. Mills, Suman Satyal, Guillermo Torres, Eric Agol, Daniel C. Fabrycky, Daniel Jontof-Hutter, Gur Windmiller, Tobias W. A. Müller, Tobias C. Hinse, William D. Cochran, Michael Endl, Eric B. Ford, Tsevi Mazeh, Jack J. Lissauer. Discovery of a Third Transiting Planet in the Kepler-47 Circumbinary System. The Astronomical Journal, 2019; 157 (5): 174 DOI: 10.3847/1538-3881/ab0ca0

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