行星绕太阳运行的轨道是近圆形的椭圆，太阳位于每个椭圆中心的附近。
Planets orbit the sun in oval-shaped paths called ellipses, and the sun is slightly off to the side of the center of each ellipse.
它围绕其恒星飞快旋转的速度是地球绕太阳公转速度的7倍，它距那颗恒星的距离比起水星离太阳距离要近23倍。
The planet whizzes around its star more than seven times faster than Earth moves, and is 23 times closer to the star than Mercury is to our sun.
那些还不是那里全部的那么大的小行星，但他们也可称作近地小行星- - - - - -意思是他们的轨道与我们绕太阳的轨道交叉或很接近。
Those are hardly the only asteroids of that size out there, but they're the ones that also qualify as near Earth - which means they cross or approach our orbit around the sun.
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