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Planet Found With Four Parent Stars

Planet Found With Four Parent Stars

March 4, 2015
NASA JPL

— Astronomers have discovered the second known case of a planet residing in a quadruple star system.

— The planet was known before, but was thought to have only three stars, not four.

— The findings help researchers understand how multiple star systems can influence the development and fate of planets.

Growing up as a planet with more than one parent star has its challenges. Though the planets in our solar system circle just one star — our sun — other more distant planets, called exoplanets, can be reared in families with two or more stars. Researchers wanting to know more about the complex influences of multiple stars on planets have come up with two new case studies: a planet found to have three parents, and another with four.

The discoveries were made using instruments fitted to telescopes at the Palomar Observatory in San Diego: the Robo-AO adaptive optics system, developed by the Inter-University Center for Astronomy and Astrophysics in India and the California Institute of Technology in Pasadena, and the PALM-3000 adaptive optics system, developed by NASA’s Jet Propulsion Laboratory in Pasadena, California, and Caltech.

This is only the second time a planet has been identified in a quadruple star system. While the planet was known before, it was thought to have only three stars, not four. The first four-star planet, KIC 4862625, was discovered in 2013 by citizen scientists using public data from NASA’s Kepler mission.

Artist’s impression of quadruple star system.

 

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Image copyright: Karen Teramura, UH IfA

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