Ten new planets outside our Solar System have been spotted by the French-led Corot satellite, bringing the total number of known exoplanets to 561.
They include one planet orbiting an unusually young star, and two Neptune-sized planets orbiting the same star.
Corot, launched in 2006, spots planets by measuring the tiny dip in stellar light that occurs when planets pass between the stars and the Earth.
It has now added 23 planetary systems to the ever-growing roster.
Corot, operated by France's space agency CNES, was launched in late 2006. It went into orbit shortly before Kepler, a similar mission by the American space agency Nasa.
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