New multi planet solar systems found

(CNET): NASA's Kepler spacecraft, hunting for distant worlds by measuring the slight dimming of starlight as planets pass in front of their parent suns, has found its first multiplanet solar system. The Kepler-9 system includes two Saturn-class worlds orbiting in gravitational lockstep close to their star and a possible third planet just a bit larger than Earth that whirls through a hellish "year" in just 1.8 days. The announcement came just a few days after a European team, using a different technique with a ground-based telescope, revealed the discovery of a solar system with up to seven planets, including another candidate planet slightly larger than Earth.