这就是所谓的春分点。
在一个回归年内，太阳从春分点转回到春分点。
During a tropical year the sun moves from Vernal Equinox to Vernal Equinox.
在春天，当太阳在春分点附近，北半球的人看得最清楚。
In the Northern Hemisphere they can be seen best in the spring, when the Sun is near the Vernal Equinox.
白羊点是一个交点，也为春分点，太阳由南向北时通过天球赤道的点，。
The Aries point, or vernal equinox in the tropical zodiac, is a NODE. It marks the place where the sun crosses the equatorial plain going north.
首先，基于归一化的改进春分点根数建立了星际小推力转移轨道的优化模型；
First, the optimization model of interplanetary low-thrust trajectory was established using modified equinoctial elements.
先选择报告菜单，点击春分点关闭，下次你打开表单的时候，即显示春分点开启。
First select Reports menu, and then click "Vernal Point Off" so that it will say "Vernal Point On" the next time you open this menu.
也是在春分点，广阔的土星环的影子被压缩成一层很窄带子投射在这个行星上，这也可以在组图中看到。
Also at equinox, the shadows of the planet's expansive rings are compressed into a single, narrow band cast onto the planet as seen in this Mosaic.
在每一年的春分点上，太阳横跨着地球上的赤道，使得地球上大部分地区的白天和夜晚的时间接近相等。
At each equinox, the sun crosses the Earth's equator, making night and day of approximately equal length on most of the planet.
当前的占星纪元就是太阳春分点上的双鱼座，大约在公元前150年开始，而“宝瓶座时期”则开始于公元2600年。
The current astrological age started when the equinox precessed into the constellation of Pisces, in about the year 150 BC, with the "age of Aquarius" starting in AD 2600.
未来行星颗学家会持续研究春分点前后的影像，进而了解这个太阳系内拥有最大行星环的行星，动力成因与粒子分布特征。
Planetary scientists will be studying ring images taken near equinox to help better understand the dynamics and particle size distribution of the Solar system's most extensive ring system.
今年，春季开始于3月20日星期六，这是因为这一天是日历里的春分点。春分点或秋分点，意味着每年的春季和秋季开始了。
This year, spring starts Saturday, March 20, because that is when the so-called vernal equinox occurs.
在默认的设置下，太阳火5宫的差异列表显示的是任意一对行星之间的弧度，如果要看单个行星的弧度，你需要加上白羊座0度或者春分点到你的差异列表上。
By default, Solar Fire 5's Difference Listing shows the arcs between all the pairs. To see the arcs for individual planets, you'll need to add the Aries or Vernal Point to your Difference Listing.
在默认的设置下，太阳火5宫的差异列表显示的是任意一对行星之间的弧度，如果要看单个行星的弧度，你需要加上白羊座0度或者春分点到你的差异列表上。
By default, Solar Fire 5's Difference Listing shows the arcs between all the pairs. To see the arcs for individual planets, you'll need to add the Aries or Vernal Point to your Difference Listing.
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