You are probably aware that the earth's orbit around the sun is not shaped like a perfect circle.
你可能知道，地球围绕太阳的轨道形状不像一个完美的圆。
Astronomers have detected an asteroid not far from Earth, moving in the same orbit around the Sun.
天文学家在距离地球不远处发现一颗小行星，它与地球在同一轨道上围绕太阳运行。
It is long known that Earth's orbit around the Sun changes periodically, cyclically affecting the way solar radiation strikes the Earth.
人们早就知道，地球围绕太阳的轨道会周期性地变化，周期性地影响太阳辐射照射地球的方式。
Milankovitch proposed in the early twentieth century that the ice ages were caused by variations in the Earth's orbit around the Sun.
米兰科维奇在20世纪早期提出，冰河时代是由地球绕太阳运行轨道的变化引起的。
A lot of people think of earth's orbit around the sun as being perfectly circular, as smooth and as regular as, say, the way that hands move on a well-made watch, but it just doesn't work that way.
很多人认为地球绕太阳的轨道是完美的圆形，就像手在一块制作精良的手表上移动那样平滑、有规则，但事实并非如此。
Mars's orbit around the Sun is the fourth fastest orbit of all the solar system planets.
在太阳系所有行星中，火星绕太阳的轨道速度第四快。
The reason for a leap day or a leap year is because our calendar does not follow the Earth's orbit around the sun exactly.
闰日或闰年出现的原因是我们的历法并不精确地遵循地球围绕太阳运行的轨道。
But in orbit around Saturn, Cassini had no such problems.
但是在环绕土星的轨道上，卡西尼就没有这样的问题。
Now I wonder, what is the kinetic energy of the Earth in orbit around the sun?
我想知道地球绕太阳，公转的动能是多少？
As of 2007, three extrasolar planets have been confirmed in orbit around this pulsar.
直至2007年，在这颗脉冲星周围轨道上已有三颗系外行星被确认。
As an example, say you have an item that you want to move in a circular orbit around the screen.
例如，假设想要有一个在屏幕中沿着圆形轨迹运动的项。
Today almost 900 of the things are in orbit around Earth, operated by more than 40 countries.
如今有40多个国家的近900个人工天体在地球轨道上运行。
The unmanned probe launched March 31, 1966, and entered orbit around the moon two days later.
这艘无人驾驶的航天器发射于1966年3月31日，并在两天后进入绕月轨道运行。
The Mars Reconnaissance Orbiter is NASA's most powerful spacecraft currently in orbit around Mars.
目前在火星轨道上运行的火星勘测轨道飞行器是NASA最强大的航天器。
The ecliptic plane is defined as the imaginary plane containing the Earth's orbit around the sun.
黄道平面是一个假想的平面，理论上它包含了地球环绕太阳运行的轨道。
The image celebrates the 20th anniversary of Hubble's launch and deployment into an orbit around Earth.
为庆祝哈勃望远镜升空并进入绕地轨道运行20周年纪念拍下了这个图片。
As a result, thousands of websites and apps have essentially become satellites that orbit around Facebook.
结果，成千上万个网站和应用像卫星一样，围绕着Facebook运行。
This image was taken by HiRISE camera on board the Mars Reconnaissance Orbiter, currently in orbit around Mars.
这幅图像是由火星轨道探测飞船上搭载的高分辨率科学实验照相机（HiRISE）最近在环绕火星的轨道上拍摄的。
As you can see in Listing 5, making a view orbit around in a circular path is very easy if you utilize constraints.
如清单5所示，如果使用约束的话，产生一个沿着圆形轨迹移动的视图非常容易。
This artist's animation illustrates a massive asteroid belt in orbit around a star the same age and size as our Sun.
从这个艺术化的图片可以看到在围绕一个和太阳年龄和大小相当的恒星轨道上有一个巨大的小行星带。
Nearly three days after launch, the braking engines fired and the Apollo 8 capsule went into orbit around the moon.
发射后差不多三天时间，制动火箭启动了，阿波罗8号飞船进入了月球轨道。
Muller and others believe that the dark star probably takes about 26m years to complete an orbit around the sun.
马勒和其他一些人认为，这颗暗星绕太阳运行一周大约要用2600万年的时间。
NASA's Mercury probe Messenger has become the first spacecraft to go into orbit around the closest planet to the Sun.
美国国家航空航天局(NASA)的信使号水星探测器成为有史以来第一个到达水星轨道的空间飞行器。
The Hubble Space Telescope continues to make valuable discoveries after more than twenty years in orbit around Earth.
哈勃望远镜在绕地球轨道服役超过20年后继续获得极有价值的发现。
And what a beast it is: as wide as Earth's orbit around the sun and 4.3 million times more massive than our home star.
简直是个巨兽啊！ 宽度相当于地球公转轨道的直径，质量比我们的太阳还大430万倍。
It takes Earth 24 hours to complete a rotation on its axis, and roughly 365 days to complete an orbit around the sun.
地球要花费24小时完成绕地轴一周的自转，花费大约365天完成绕太阳一周的公转。
As another example the center of mass of the earth and moon moves in an approximately circular orbit around the sun.
作为另一个例子，地球和月亮的质心就是在一个绕太阳的近似的圆轨道上运行。
The one that the Swiss team thinks it hasdiscovered is in orbit around a star called Gliese 581, some 20 light yearsfrom Earth.
瑞士的一组天文学家认为他们在围绕恒星Gliese 581运动的轨道上发现了一颗岩状行星，距地球约有20光年。
The Cassini spacecraft brought a disk of signatures into orbit around Saturn.The Phoenix Mars Lander took DVD to Mars' north pole.
卡西尼号将一张储存有签名的DVD带到了土星轨道上，凤凰号火星探测器将一张DVD带到了火星的北极。
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