The anomalistic year is the time between successive transits of the Earth through the perihelion.
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2. 根据Marsden的计算，这颗彗星会在3月18日过近日点。
According to Marsden's calculations, this comet reaches its closest point to the Sun (perihelion) on March 18th.
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3. 当地球从远日点运动到近日点时，地球辐射带向内收缩。
W hen the Earth moves from perihelion to aphelion, its radiation belts are expansion, and aphelion to perihelion contraction.
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4. 近点距离， 近点角从太阳观察到的行星距近日点的角度偏差。
The angular deviation, as observed from the sun, of a planet from its perihelion .
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5. 但这并不是简单的一件事情，因为近日点和远日点的日期都会变换。
But it's not that simple either, because the dates of the perihelion and aphelion are also shifting.
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6. 在轨道上最接近太阳的点被称为近日点，而最远离太阳的点被称为远日点。
The point in the orbit nearest the sun is called perihelion, while the point farthest is called aphelion.
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7. 用史瓦西度规详尽地推导了太阳引力场，用广义相对论解释了水星近日点的进动。
This paper derives in detail the gravitational field of the sun by using the Schwarzschild metric, and expounds the advance of the Mercury's perihelion with the general theory of relativity.
Easy to spot in binoculars for now, McNaught will sink into the twilight along the eastern horizon in the coming days as it heads toward perihelion (closest approach to the Sun) on July 2.
This composite neatly compares two pictures of the Sun taken with the same telescope and camera on the dates of Perihelion (closest approach) and Aphelion in 2008.
Right now, odds are that Comet Elenin will become an easy target for binoculars around mid-August and reach naked-eye visibility for a couple of weeks around perihelion.
Right now, odds are that Comet Elenin will become an easy target for binoculars around mid-August and reach naked-eye visibility for a couple of weeks around perihelion.
