For thousands of years comets had been a mystery to S1.______
man. They travel across the sky very fast and have a
bright 'tail' of burnt gas. The comet Tempel 1 has an S2.______
orbit far outside the orbit of the furthest planet in our
solar system, Pluto. It has had been there for 4.6 billion years, S3.______
133 million kilometres from Earth. Last week
a little American spacecraft crash into Tempel 1. S4.______
The spacecraft had a camera and it took a photograph
of the comet every minute after it finally crashed into S5.______
its surface. The space mission to Tempel 1 cost $335
million and was called Deep Impact. Spacecraft was S6.______
travelling at 37,000 kilometres per hour when it hit the comet
and the crash completely destroying the spacecraft. But before S7.______
it hit the comet, the spacecraft took some amazingly photographs. S8.______
The last one was a close-up picture the spacecraft spent S9.______
just 3 seconds time before it crashed into the comet. S10.______
【S1】

A.______
man.
B.______
orbit
C.6
D.______
133
E.______
The
F.______
its
G.______
travelling
H.______
it
I.______
The
J.______
just
K.______
【S1】