Comment Re:Why? (Score 5, Informative) 108
There wasn't enough fuel to sustain orbit. The team responsible for this went to heroic lengths to keep it in orbit --- including at one point venting the spacecraft's helium to give it a final boost. This was all done so the probe could keep sending back data, which it did happily. In the end we got approximately four times the expected data we wanted from the probe.
Not bad for government contractors.