[dylan604]

From that link:

Launch: 2 March 2004

Mission end: 30 September 2016

Then, a bit lower on the page: 786 days in space

Huh? Anyone got insights on what type of math was used here? Is there mm/inch type conversion problem? Am I just dumb? 12 years * 365 > 786.

[avian]

786 days is time spent in the vicinity of the comet. From 6 August 2014 (arrival at comet) to 30 September 2016 (mission end).

[dylan604]

But that's not what the words say. "In space" is stated specifically, not "Time in orbit" or some such. You're being very very generous