近日点

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。

But it 's not that simple either , because the dates of the perihelion and aphelion are also shifting .

Lenz矢量和近日点进动率

Lenz vector and perihelion shift

在1859年LeVerrier发现了水星近日点进动之异常。

In 1859 , Le Verrier discovered the mercury perihelion advance anomaly .

众所周知，Newton引力理论有一些无法解决的疑难，例如万有引力定律方程式的非洛伦兹协变性、水星近日点的附加进动等。

It is well known that , Newton 's gravitational theory has some intrinsic difficulties , such as the non-Lorentz covariant of the gravitational field , the orbital precession of Mercury etc. .

Runge-Lenz矢量与水星近日点进动

The Runge-Lenz Vector and the Perihelion Precession of Mercury Orbit

这位访客是一颗名叫伊森（ISON）的原始彗星，自走出家门已至少有100万年，它于美东时间周四下午飞抵近日点。

The visitor , a pristine comet called ISON that left its home at least a million years ago , made its closest approach to the sun Thursday afternoon .

而每年的地近日点（1月3日或4日）正置圣诞节过后几天，因此，日、月、地相对运动每隔4.425a在圣诞节前后三者距离总会达到最近。

The perihelion of the earth each year is just several days after Christmas Day ( 3 or 4 January ) . So , the distances from the earth to the sun and from the earth to the moon may reach the closest point around Christmas every 4.425 years .

当月球与地球到达它们的近地点和近日点的时间恰好重合时，就会引起最大的潮汐。

When perigee and perihelion coincide tidal range is at its greatest .

太阳扁率对水星近日点进动的贡献

The Effect of Solar Flattening on the Advance of the Perihelion of Mercury

引力磁矩对粒子近日点移动的贡献基于移动介电笼的生物粒子分离

Separation of bio-particles based on moving dielectrophoretic cages The Mobile Computing and the Future Education

近点年是地球连续两次通过近日点之间的时间。

The anomalistic year is the time between successive transits of the Earth through the perihelion .

这场流星雨出现时，一个名为斯威夫特-塔特尔的彗星正经过近日点。

This meteor shower happens when the earth 's orbit passes near the path of a comet called Swift-Tuttle .

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 .

从太阳观察到的行星距近日点的角度偏差。

( astronomy ) position of a planet as defined by its angular distance from its perihelion ( as observed from the sun ) .

他还算出这个行星在距离太阳最近的近日点比在距离太阳最远的远日点时运动的速度快。

He also figured out the planet goes faster when it 's at perihelion , nearer the sun , than when it 's at aphelion , its furthest distance .

他还计算出地球在近日点（即距离太阳最近的点）比在远日点（即距离太远最远的点）运行得更快。

He also figured out the planet goes faster when it 's at perihelion , nearer the sun , than when it 's at aphelion , its farthest distance .

虽然预测彗星在不同角度的亮度是非常困难的，但是当1997年4月1日海尔波普彗星通过近日点时，达到甚至超过了大多数的预测。

Although predicting the brightness of comets with any degree of accuracy is very difficult , Hale-Bopp met or exceeded most predictions when it passed perihelion on April 1 , 1997 .

1985年12月至1986年4月哈雷彗星近日点前后，云南天文台分别在昆明和思茅两地进行了大尺度现象观测。

During the period of December 1985 to April 1986 , before and after , perihelion passage of Comet ' Halley , Yunnan Observatory performed the Large-scale phenomena observations in Kunming and .

同时，新月正好处于近日点附近，也就是月球轨道上离地球最近的一点，又使得月亮的视尺寸接近最大。

It also occurred when the New Moon was near Perigee , the closest point to Earth in the Moon 's elliptical orbit , making the Moon near its largest apparent size .

所以，当布朗和他的两名同事在80亿英里远的地方发现了一片直径600英里的冰雪世界时，科学家们颇为意外。就连该天体运行轨道的近日点也在柯伊伯带以外。

Thus they were surprised when Dr. Brown and two colleagues spotted a 600-mile-wide icy world at a distance of eight billion miles that remained well outside the Kuiper belt even at the closest point in its orbit .

近日点是最接近母恒星的轨道上的点，而序号为2000BD19的小行星拥有最小的轨道，与太阳无限接近。太阳是巨大的伴有核爆炸的火球，它为人类提供了温暖和生命。

Perihelion is the point in orbit nearest the parent star , and asteroid 2000 BD19 has the smallest orbit , getting incredibly intimate with the giant , hot ball of nuclear explosions that keeps us warm and alive .

因为近日点只有0.092个天文单位——一个天文单位是地球跟太阳的平均距离——2000BD19表面会变得十分炎热，其高温度足以使锌和其他金属融化。

Since the perihelion is only . 092 astronomical units - 1 AU is about how far the Earth is from the Sun , on average - HD19 gets hot . Really hot actually , reaching temperatures that could melt zinc and other metals .

近日他有点苦恼。

He is a bit trying these days .

从目前预售票情况来看，前往北京、哈尔滨、成都、广州、深圳等方向的城市近日票情有点吃紧，省内线上，客流则集中在蚌埠、淮北、阜阳等地。

It is currently estimated that tickets are in great demand to the cities like Beijing , Harbin , Chengdu , Guangzhou , Shenzhen , etc. , and also to Bengbu , Huaibei , Fuyang inside the province .