NASA’s Kepler spacecraft has discovered 170 planetary systems keeping between two and six transiting planets.According to new study alien solar systems with multiple planets are enough different than our Solar System.NASA’s Kepler Space Telescope detected 1,235 alien planet candidates in its first four months of operation, 408 of them is in multiple-planet systems.In our Solar System the special thing is the planets’ orientation. According to researchers some of them are tilted greatly off the solar system’s plane, while most of the Kepler systems are nearly as flat as a tabletop. Researchers think that the multiple-planete are so flat because there aren’t Jupiter-size giant planets, whose gravitational influence can break down planetary systems.
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Researchers hope that the studies of the multiple-planet systems could help them confirm the densities of small, rocky, Earthlike alien worlds.