But the new system, dubbed Kepler-9, is the first system that is known for sure to have two transiting planets.
但新发现的行星,即开普勒9号发现的,是目前发现的第一个拥有两颗行星的恒星系统。
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The Kepler 11 solar system is interesting not just because it has more planets than any we've observed outside our own, but also because it's extremely compact.