美俄卫星太空大碰撞，上演现实版"星球大战"。
.Just recently, above planet Earth, in outer space, a story a little like a Star Wars movie... of 700-900km above the Earth, said Du Heng, a space debris expert with the Chinese Academy ……

whose destiny, after traveling in space for millions of years, was to crash to Earth at exactly 7:17...A HUNDRED years ago this week, a gigantic explosion ripped open the dawn sky above a forest ……

In the future, you may take a space elevator (太空电梯). It goes thousands of kilometers above the Earth. ……

as high as 6km above the moon's surface. But telescopes on Earth and cameras aboard the satellite... and satellite crashed into the moon on October 9, and it was no accident. NASA planned the crash landing ……

to around 2,000 kilometers above the Earth. There, spacecraft are most likely to crash with each other...’s low orbit (轨道), which reaches up to around 2,000 kilometers above the Earth. There, spacecraft ……

Hubble into space. It stayed above Earth’s atmosphere (大气层), so it could take clear pictures...; Finally, it may crash (撞击) to Earth in the 2030s. Its debris may fall into the sea.New telescope ……

,000 kilometers above Earth. There, spacecraft are most likely to crash into each other. There may...’s low orbit (轨道), which reaches up to around 2,000 kilometers above Earth. There, spacecraft are most ……

. That piece is now known as the moon. Many believe that this crash made the Earth spin.Think about...Q: Why does the Earth spin (自转)?A: After the birth of the Earth, scientists believe there were huge ……

首次卫星相撞:太空中的交通事故。
communications satellite about 780km above Siberia (西伯利亚) in Russia. The accident made more than 500....It is the first satellite crash that has been made public. People are worried. They understand how crowded ……

energetic but indirect crash between Earth and a planet the size of Mars, which is about half Earth's size... have been sent into orbit around the Earth as a result of the crash.The indirect angle ……

A picture of the International Space Station above Earth.  VCG  NASA prepares... long presence at an average altitude of 400 kilometers above Earth, this 450-ton behemoth (庞然 ……

A picture of the International Space Station above Earth.  NASANASA prepares... to the “graveyard (墓地) orbit”, which is about 36,000 kilometers above Earth. It serves as a resting place ……

器) will crash itself into an asteroid. It will make the asteroid move away from Earth.Meet DARTMeet...如何保护地球免受小行星撞击？如何保护地球免受小行星撞击？  Asteroids (小行星) pass Earth often. Some of them can be close ……

. Some thought it was an air crash, others an earthquake.What can be done to protect the Earth against... the effect of a seriously large asteroid (小行星) hitting the Earth. After all, it is likely that the force ……

pieces of rock, called plates (板块), under the Earth's surface. When the plates crash or move apart...火山喷发是壮观的，但它同时也会给人类带来深重的灾难。THEY are called the "mouths of the Earth". If they get "angry ……