2011年8月29日 星期一

0825 Voyager: Exploring the planets and beyond

On August 25,1981,spacecraft Voyager 2 made  its closet approach to Saturn,placing that date in scientific record books. On the same day eight years later, voyager 2 again made history when it made its closet pass by Neptune. It was the first vessel to visit our solar system's mysterious eighth planet.
An ambitious mission
In 1977 NASA launched the unmanned Voyager 1 and 2 spacecraft with the goal of exploring Saturn and Jupiter. Voyager 1 would gather information about their atmosphere, interiors, satellites and magnetic fields. The spacecraft reached Jupiter on March 5 1979 ,and then Saturn the following year.

Voyager 1 was able to take approximately 32,000 photos of Jupiter and Saturn, as well as their moons and rings. Voyager 2 had a similar mission, which was later extended to include the exploration of Uranus and Neptune. From the data sent back from the two craft, scientists have discovery ed new moons, active volcanoes and information about the planet's rings. And the Voyager mission continues. What started as an expedition to research the plants past the asteroid belt has grown into a push to explore the edge of the solar system.

Grammar On the Go
When started as a loom factory has grown into the nation's largest car company.
What started as one man's independent work to help the poor and needy in one city has grown into an international organization with social services available in over 100 countries.
Approximately 10,000 pepole went to that concert.
The flight will arrive at approximately 8 pm.
The exploration of outer space has been Carlies's dream since childhood.
Teh exploration for oil field in theNorth Pole still continues.
Margaret went on an expedition to Africa right after she graduated from college.
The expedition to the South Pole consists of people all different age groups.

沒有留言:

張貼留言