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。

youdao

A total lunar eclipse also occurs when the sun, Earth and moon are almost exactly in line, leaving the full moon appear much dimmer than usual.

而太阳、地球和月亮又几乎处于一条线上，月全食出现，导致满月比往常晦暗许多。

youdao

STEREO, a two-year mission that launched October 2006, provided a unique and revolutionary view of the Sun-Earth System.

是一个为期2年的任务，它于2006年10月发射，给我们提供了独特的和创新性的视角来观察太阳-地球系统。

youdao

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

He'd been imprisoned for his intellectual daring and affirming the Copernican view that the earth orbited around the sun.

因他对哥白尼的地心说的大胆的,认可和支持而被软禁着。

耶鲁公开课 - 弥尔顿课程节选

You konw, the earth is gonna be burnt up by the sun one of these thousands of years.

在未来几千年中的某一年,地球会被太阳燃成灰烬。

麻省理工公开课 - 电影哲学课程节选

It is not circling the Earth but orbits a point in the Sun-Earth system called the second Lagrange point.

CNN: Better 'baby picture' of universe emerges

To the sun, the Earth is a tiny speck: its diameter is less than 0.01% of the Earth-sun distance.

CNN: The sun, the moon and the Titanic

There are probably many more comets than near-Earth asteroids, but Nasa points out they spend almost all of their lifetimes at great distances from the Sun and Earth, so that they contribute only about 10% to the census of larger objects that have struck the Earth.

BBC: Dinosaur-killing space rock 'was a comet'