介绍:
20160520： Trouble with the Hubble 哈勃望远镜的困境
The Hubble telescope was launched into space by NASA on April 20,1990 at a cost of
over abillion dollars. Right from the start there was trouble with the Hubble. The pictures
it sent uswere very disappointing because its main mirror was faulty! NASA is now going
to put thetelescope right, so it will soon be sending up four astronauts to repair it.The
shuttle Endeavour will be taking the astronauts to the Hubble. A robot-arm from the
Endeavourwill grab the telescope and hold it while the astronauts make the necessary
repairs.Of course, the Hubble is above the earth's atmosphere, so it will soon be sending
us the clearest pictures of the stars and distant galaxies that we have ever seen. The
Hubble will tell us a great deal about the age and size of the universe. By the time you read
this, the Hubble's eagle eye will have sent us thousands and thousands of wonderful
pictures.
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