Article: Amazing voyager: 25 years of exploring space. (Earth science: solar system/interstellar space).

They're the most distant human-made objects in space. And soon they'll exit the solar system forever. In 1977, NASA launched the identical robotic probes Voyager/and 2 into deep space. Through their visits to four planets and 48 moons, they've transmitted a wealth of spectacular images and unprecedented scientific data. Recently, the twins celebrated their 25th birthday at 6.3 and 7.9 billion miles from Earth, and the hard-working pair is still going, going, and going ...

1 Cape Canaveral, Florida

August 20 and September 5, 1977 The launches are timed to meet a rare planetary alignment in order to travel the most distance using the least amount of time ...

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