Artist's rendering of Pioneer 10.
Click on image for full size
Image courtesy NASA
Pioneer 10 falls silent
News story originally written on March 7, 2003
NASA scientists were unable to detect a signal from Pioneer 10
when they tried to contact the spacecraft on February 7, 2003. They believe Pioneer 10's radioisotope power supply
no longer generates enough energy to power the spacecraft's transmitter.
The last signal received, on January 22, was very weak.
Pioneer 10 was launched from Earth on March 2, 1972. It was the first spacecraft to pass through the
asteroid belt, and the first to visit
Jupiter and provide us with close-up pictures of the largest planet
in our Solar System. Pioneer 10 was originally designed to last long enough to complete a 21-month mission.
As it turned out, the spacecraft sent signals back to Earth for more than 30 years!
When the last signal from Pioneer 10 was received, the spacecraft was more than 12 billion kilometers
(7.6 billion miles, or 82 AU) from Earth. At that distance,
radio signals from Pioneer 10, traveling at the speed of light, took more than 11 hours to reach Earth.
The spacecraft is headed out of our Solar System, having passed the orbit of Pluto in 1983,
in the general direction of the star Aldebaran
in the constellation Taurus. Pioneer 10 will reach Aldebaran,
which is 68 light-years away,
in about 2 million years. The spacecraft carries a gold plaque
with information about Earth; just in case "somebody out there" finds it!
Shop Windows to the Universe Science Store!
Our online store
on science education, ranging from evolution
, classroom research
, and the need for science and math literacy
You might also be interested in:
How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more
The Pioneer missions were designed to study our Sun's environment and the planets. Although some of the launches failed, the Pioneer program can still be considered a success. Pioneer 1 was launched in...more
Asteroids are small bodies that are believed to be left over from the beginning of the solar system 4.6 billion years ago. They are rocky objects with round or irregular shapes up to several hundred km...more
What's in a Name: Arabic for "Follower" because it rises after the Pleiades. The Pleiades is a group of 6 stars traveling together through space. The eye of the constellation Taurus, the bull. Claim to...more
Taurus is most commonly known as The Bull. It passes through the sky from November through March, but is most visible in January. Taurus was a very popular constellation in ancient times, so there are...more
NASA scientists were unable to detect a signal from Pioneer 10 when they tried to contact the spacecraft on February 7, 2003. They believe Pioneer 10's radioisotope power supply no longer generates enough...more
The Mars Exploration Rovers (MER) mission is now underway. Twin robotic vehicles bound for Mars were successfully launched from Cape Canaveral in Florida. The rovers, which will explore the geology of...more
1998 was a very full year when it came to space exploration and history making. In the blast-from-the-past department, John Glenn received another go for a launch aboard Space Shuttle Discovery. After...more