Let us not lose these, little stars on the earth.
我们可不能失去这些，地球上的小星星。
Nuclear fusion - the melding of atomic nuclei that happens inside stars - is a long-sought goal on Earth.
核聚变是发生在恒星内部的原子核融合，是地球上长期追求的目标。
And out of this information you get the radius, the velocity and the period, assuming that you are on Earth in the plane of the orbit of the stars.
除了这个，还能得到半径的大小，速度以及周期，假设你在地球上，和这些恒星环绕的，轨道同处一个平面。
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