April 28, 2001 (April sixth days), Government House, lost contact with Earth, Pioneer 10 "sending signals back to Earth.

2001 4 28, the first human fly out of the solar system's space probes Pioneer 10 and the Earth lost contact eight months, 11.2 billion kilometers in space sent to Earth back signals. Pioneer 10 launch in March 1972, it is the first harmlessly through the meteorite belt between Mars and Mercury, sent back photographs of Jupiter and Saturn; first arrived Mercury; (l $ j��.c��) first flew over the orbit of Pluto, the spacecraft out of the solar system. Pioneer 10 spacecraft in June 1986, flying out of the solar system, and retired on March 31, 1997, its distance from Earth is about 11 billion kilometers, it will continue to the direction of the constellation Taurus forward, if successful, will be 200 million years later arrived in the Taurus constellation.