Vintage NASA Spacecraft to Tackle Interplanetary Science, Space.com
“A private team is priming a 36-year-old NASA spacecraft to perform new science as it travels through interplanetary space after attempts to move the probe into a position closer to Earth failed. The volunteer team initially hoped to park the vintage International Sun-Earth Explorer 3 spacecraft, called ISEE-3 for short, in a stable location between the Earth and the sun called L-1. But those attempts ended when controllers discovered there wasn’t enough nitrogen pressurant left in the probe’s tanks to help make course corrections.”