The majority of the more than 300 "extrasolar planets" now known were spotted by watching the tiny wobble in stars' position as enormous, Jupiter-sized planets swung around them.

这300多颗日外恒星中大多数被发现的原因都是由于他们自身位置会受到巨型行星（大小与木星类似的行星）的公转影响而产生微小摆动。

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The data on Gliese 710, an orange dwarf star, comes from position and velocity measurements of about 100, 000 stars in the Hipparcos Catalogue published in 1997.

一颗橙矮星，其数据来自1997年出版的包含约十万颗恒星的位置和速度测量数据的依巴谷目录。

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He built a model that could move in order to show how the position of the stars changed from season to season.

他做了一个可以移动的模型，以便显示出星星的位置是如何随着季节的变化而变化的。

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A navigator had to use complex observing instruments to note the position of the moon and stars.

VOA: special.2010.07.14

When bad weather prevented navigators from seeing the sun,moon or stars, they had to use a method called "dead reckoning" to find the ship's position.

VOA: special.2009.12.23

Unlike a conventional spacecraft, which would be navigated on the basis of signals sent to and from ground controllers, Deep Space 1 is programmed to make its own left-right, up-down decisions on data from sensors that look at the stars to track position and guide course changes.

CNN: Spacecraft set for risky asteroid flyby

The Mayan calendar is based on the position of the heavenly bodies -- the sun, the moon and the stars -- and was meant to tell the Mayan people about agricultural and economic trends, said archeologist Alfredo Barrera.

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Since their split Willis has maintained his position as one of the most important world film stars and this week was ranked ninth in a list of the most powerful showbiz figures.

BBC: Willis and Moore divorce