MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Artwork of a planet around the binary star Kepler-35, seen from one of its imagined moons. Kepler-35 is a binary system consisting of two early K-type main-sequence stars. Each is very similar in mass and diameter to the Sun, but they are somewhat more orange. They orbit their common centre of mass at an average distance of just 0.18 AU (about half the Sun-Mercury distance), taking 20 days to complete one orbit. Scientists have found a Jupiter-class planet in orbit around the binary - a so-called circumbinary planet - at a distance of 0.6 AU, taking 131 days to complete a full circuit. Called Kepler-35b, it is only 70% the size of Jupiter and has about 13% of its mass. This image shows the planet (with imagined with rings) partially eclipsing one of the two stars, as seen from a hypothetical satellite orbiting the planet.
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