在一种模拟的情景中，一个与天王星大小差不多的行星处在一个星球的可栖居的地带，不冷不热，并且周围有一个地球大小的恒星。
In one simulation, a planet with the mass of Neptune situated in the habitable zone of a star - not too hot, not too cold - was given a moon the size of Earth.
这个想法是沿着所谓的黄道面拍摄夜空，这个地带是空中的这个范围中大部分其他的行星轨道，观察是否有东西移动。
The idea was to take pictures of the night sky along what’s known as the ecliptic plane, the band in the sky where most of the other planets orbit, and see if anything moved.
“这代表开普勒团队向实现其目标迈出了重要一步，他们的目标是确定在类太阳恒星周围的可居住地带出现地球大小的行星的频率，”霍尔曼博士说。
"This represents a significant step toward Kepler's goal of determining the frequency of Earth-size planets in the habitable zones of Sun-like stars," Dr. Holman said.
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