re-use

[Plane]

http://www.aolnews.com/science/article/deep-impact-nasa-ship-begins-photographing-mysterious-comet/19702972?ncid=AOLDSN00280000000026

The flyby was a triumph for Deep Impact, a middle-aged spacecraft that was supposed to have been turned off years ago. The ship accomplished its intended mission, a visit to another comet known as Tempel 1, in 2005. At that point NASA had nothing else for the spacecraft to do, and it was put to sleep.


But NASA managers quickly realized there was no point letting a perfectly fine spaceship go to waste, so they woke it up and ordered it to chase down a second comet.

With its successful rendezvous with Hartley 2, Deep Impact became the first spacecraft to visit two comets.