Voyager 2

The spacecraft late last month began sending science data 8.6 billion miles to Earth in a changed format that mission managers could not decode.

Engineers have since instructed Voyager 2 to only transmit data on its own health and status while they work on the problem.

Launched in 1977, Voyager 2 and its twin, Voyager 1, explored the giant planets Jupiter, Saturn, Uranus and Neptune and kept on going. Nearly 33 years later, they are the most distant human-made objects.

Voyager 1 is 10.5 billion miles from Earth and in about five years is expected to pass through the heliosphere, a bubble the sun creates around the solar system, and enter interstellar space.

Voyager 2 will follow after that.



Voyager 2 carries a disk with greetings in 55 languages on it in case the craft encounters other life forms.

Dr Edward Stone, a scientist on the project, said the desk, called the Golden Record, is "a kind of time capsule, intended to communicate a story of our world to extraterrestrials.