An eclipse happens when the earth and moon are in line with the sun.

地球和月亮与太阳处在一条直线上，日食就发生了。

《牛津词典》

Image by NASA/JPL-Caltech. Caption by Holli Riebeek, derived from Jupiter-bound space probe captures Earth and Moon.

图片由美国航天局/加州理工学院喷气推进实验室提供，截取于木星空间探测器抓拍到的地球和月球照片，霍莉·瑞贝克注释。

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Lunar eclipses occur when the sun, Earth and moon sit in alignment and the Earth blocks sunlight from reaching the moon.

当太阳、地球和月球成一直线且地球遮挡了太阳照到月球上的太阳光。

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The astronauts would ride to the moon in the command module and then ride back to Earth in it.

VOA: special.2009.07.22

Astronomers use the observatory to study the positions and movements of the Earth, sun,moon and other objects in space.

VOA: special.2009.09.21

That was when men from Earth -- American astronauts flew their Apollo Eleven spacecraft to the moon, landed and returned home safely.

VOA: special.2009.07.29

This marks the longest one-way communication via laser, as the light made its way across the 240, 000 miles between the Earth and Moon.

FORBES: NASA Uses Lasers To Send The Mona Lisa To The Moon

More likely, craters on both the earth and the moon were the acne scars left by volcanic eruptions.

ECONOMIST: Gene Shoemaker

In 1609, Italian philosopher and physicist Galileo Galilei used descriptions of Lippershey's gadget to build his own telescope, and with it he was able to observe the Earth, the Moon and several planets in our solar system in detail for the first time.

FORBES: No. 17: The Telescope