Old spaceships don’t die, they just get parked in very long stable orbits to fade away, but sometimes what’s assumed to be dead is still there ready to serve us again, as seems to be the case with the International Cometary Explorer:
ISEE-3 was originally launched on August 12, 1978, as the International Sun-Earth Explorer to a halo orbit about one of the Earth-Moon libration points to study Earth’s magnetosphere and its interaction with the solar wind. Then, in 1983, it employed several lunar gravity assist flybys to send it on a new journey, for which it was rechristened the International Cometary Explorer, through the tail of comet Giacobini-Zinner. ICE approached within 7,800 kilometers of the comet on September 11, 1985. In 1986, it turned its instruments toward Halley’s comet, participating in the international observation campaign, and becoming the first spacecraft to investigate two comets.
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ICE is actually on a return trip to Earth now; it’s in an orbit similar to, but slightly faster than, Earth’s, so measured relative to us, it’s taking a long, slow trip around the Sun. It will return to our neighborhood on August 10, 2014, targeted to return to the Moon, which is what originally launched it on this journey. A lunar flyby can recapture it back into Earth orbit, after which, Farquhar said, they are thinking of parking it in its original halo orbit again, from which they could launch it back out to explore more cometary targets.
So it returns home on my birthday, which is nice. There’s so much interesting stuff going unexplored in our solar system for lack of spacecraft, so it’s great to see a new purpose for an old soldier like this.
Found via Sore Eyes.