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.Are we alone? Forty years ago, NASA rocket scientists sought to answer this question by launching the Voyager spacecraft, twin unmanned spaceships that would travel further than any human-made object in history.
They are still traveling.
When Voyager 1 and 2 launched about two weeks apart in 1977 from Cape Canaveral, Florida, scientists knew little about the outer planets in our solar system, and could hardly imagine the scope of their upcoming space odyssey.
"None of us knew, when we launched 40 years ago, that anything would still be working, and continuing on this pioneering journey," said Voyager project scientist Ed Stone.
Voyager's main mission was to explore other planets including Jupiter, Uranus and Neptune, but it also carried the story of humanity into deep space.
On board each Voyager is a golden record—and record player—that is built to last one billion years or more and contains key information about humanity and life on planet Earth, in case of an alien encounter.
The sounds include the calls of humpback whales, the Chuck Berry song "Johnny B. Goode," Beethoven's Fifth Symphony, a Japanese shakuhachi (a type of flute), a Pygmy girls' initiation song, and greetings in 55 languages.
Late American astronomer Carl Sagan, one of the lead scientists involved with the project, also asked his son, Nick, who is now 46, to record his voice on it.
"Hello, from the children of planet Earth," says the young American boy.
A total of 115 images are encoded in analog form, including the Great Wall of China, telescopes, sunsets, elephants, Jane Goodall with chimps, an airport, a train, a breastfeeding mother, dolphins and images of the human sex organs
Read more at: https://phys.org/news/2017-08-forty-years-voyager-hurtles-space.html#jCp