Voyager 2 Launched in 1977 Keeps on Ticking into Deep Space
From PhsyOrg.com..."Launched in 1977, Voyager 1 and Voyager 2 are each equipped with six sets, or pairs, of thrusters
to control their movement. These include three pairs of primary
thrusters and three backup, or redundant, pairs. Voyager 2 is currently
using the two pairs of backup thrusters that control the pitch and yaw
motion of the spacecraft. Switching to the backup thruster pair that
controls roll motion will allow engineers to turn off the heater that
keeps the fuel line to the primary thruster warm."
"Voyager 2 will relay the results of the switch back to Earth on Nov. 13.
The signal will arrive on Earth on Nov. 14. (A signal voyage of a little over 13 hours) Voyager 2 is currently
located about 9 billion miles (14 billion kilometers) from Earth in the "heliosheath" -- the outermost layer of the heliosphere where the solar wind, which streams out from the sun, is slowed by the pressure of interstellar gas."