在所有与古巴有关的故事中,有一个人令我无法忘怀,他就像近日点的火星一样耀眼。
奠定了在不同的近日点回报在19世纪的灰尘足迹似乎已经在过去的两个主要的爆发负责。
我们很难用肉眼看出近日点和远日点太阳视直径的变化,但在这张图上显而易见。
太阳和地球的距离最近(近日点)时,所接收的太阳能要比距离最远(远日点)时接收的稍多一点。
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。
例如一八八二年出现的大彗星几乎擦过太阳,因为它的近日点距离太阳表面仅仅大约廿九万哩。
1·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.
现在用双筒望远镜很容易找到麦克·诺特彗星,它将在以后一段时间,在黎明东边地平线上慢慢下落,7月2日过近日点。
2·The point in the orbit nearest the sun is called perihelion, while the point farthest is called aphelion.
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。
3·But it's not that simple either, because the dates of the perihelion and aphelion are also shifting.
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。
4·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.
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。
5·W hen the Earth moves from perihelion to aphelion, its radiation belts are expansion, and aphelion to perihelion contraction.
当地球从远日点运动到近日点时,地球辐射带向内收缩。