Add Yahoo as a preferred source to see more of our stories on Google. On February 23, 1990, NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the ...

On Sept. 1, 1979, NASA's robotic space probe Pioneer 11 became the first spacecraft to fly by Saturn. Pioneer 11 launched in 1973 on a mission to explore the Asteroid Belt, Jupiter and Saturn. It ...

James is a published author with multiple pop-history and science books to his name. He specializes in history, space, strange science, and anything out of the ordinary.View full profile James is a ...

For over 30 years, the Pioneer 10 spacecraft sent photographs and scientific information back to Earth. Launched March 2, 1972, it reached speeds of 52,100 kilometers (32,400 miles) per hour on its ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF.

On February 23, 1990, NASA's Pioneer 11 spacecraft left the solar system! This was the second spacecraft to travel beyond the planetary part of our solar system, which ends at Neptune's orbit. An ...