They could go into lunar orbit or into solar orbit halfway between the Earth and Venus, or one day even land on the moon.

他们可能飞到月球轨道或者地球与金星之间的太阳轨道，甚至有一天降落在月球上。

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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。

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The planet is one of 119 known extra-solar planets, objects that orbit stars other than the sun.

这是119颗太阳系外行星中的一颗。这些行星围绕除太阳外的其他星体运行。

《柯林斯英汉双解大词典》

NASA hopes that Dawn's year long orbit around Vesta will help scientists learn more about the development of the solar system, and how asteroids and other space objects were created.

VOA: special.2011.07.27

As a mechanical engineering student at the University of Munich, he teased increasing amounts of electricity from solar cells headed into orbit.

FORBES: Sunny Optimist

This week we saw new horizons dawn for green transportation as NASA's Nanosail-D became the first solar sail spacecraft to orbit the earth and President Obama issued a call for one million electric vehicles in his State of the Union Address.

ENGADGET: Inhabitat's Week in Green: the power plant you can ski, and NASA's orbiting Nanosail-D

Similarly in 1992 the U.S. National Academy of Sciences (NAS) put forward the idea of launching 55, 000 "solar sails" into orbit around the Earth, each with an area of 100 square kilometers, the sails collectively producing the same effect as Early's single glass panel.

CNN: The shield of Ra: Could solar reflection save the planet?