For thousands of years comets had been a mystery to【M1】______man. They travel across the s

For thousands of years comets had been a mystery to 【M1】______

man. They travel across the sky very fast and have a

bright 'tail' of burnt gas. The comet Tempel I has an 【M2】______

orbit far outside the orbit of the furthest planet in our

solar system, Pluto. It has had been there for 4.6 billion years, 【M3】______

133 million kilometres from Earth. Last week

a little American spacecraft crash into Tempel 1. 【M4】______

The spacecraft had a camera and it took a photograph

of the comet every minute after it finally crashed into 【M5】______

its surface. The space mission to Tempel 1 cost $ 335

million and was called Deep Impact. Spacecraft was 【M6】______

travelling at 37,000 kilometres per hour when it hit the comet

and the crash completely destroying the spacecraft. But before 【M7】______

it hit the comet, the spacecraft took some amazingly photographs. 【M8】______

The last one was a close up picture the spacecraft spent 【M9】______

just 3 seconds time before it crashed into the comet. 【M10】______

【M1】