On 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 ...

This object is a flight spare of the Pioneer IV spacecraft, which was launched March 3, 1959, on a Juno II launch vehicle. The principal objectives of Pioneer IV were to measure radiation in space, ...

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 ...