Explorer-I, officially known as Satellite 1958 Alpha, was the first United States earth satellite.

1958年的探索者-I是美国第一个人造卫星，官方代号Alpha。

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The International Space Station is a large, inhabited Earth satellite that more than 15 nations are building in space.

国际空间站是由超过15个国家在太空组建的一颗大型载人地球卫星。

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The moon is a satellite of earth.

月球是地球的卫星。

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Back then,there was much hope that humans would return soon and make a home on Earth's only natural satellite.

VOA: special.2010.04.28

Scientists have long believed that Earth's satellite lacks the ability to hold water near its surface because it has no atmosphere.

VOA: special.2009.09.30

Military officials immediately offered to use the Jupiter to put a scientific satellite into orbit around the Earth.

VOA: special.2009.06.10

In 1958, the first U.S. Earth satellite, Explorer I, was launched at Cape Canaveral.

CNN: Saturday,

It is intended to generate 80kN of thrust and is designed to place the Earth observation satellite into its final orbit just a few hundred kilometres above the planet.

BBC: South Korea halts rocket launch

This information should give scientists fresh insight into the internal structure of Earth's satellite.

BBC: Nasa reveals new information about moon probes crash sites