Here's a stat for the record books: 1 million science observations for the Hubble Space Telescope (HST). Acheived appropriately enough on July 4th, HST "logged its one millionth science observation during a search for water in an exoplanet's atmosphere 1,000 light-years away."
For all of the details see http://hubblesite.org/newscenter/archive/releases/2011/22/full/.
Well done to the HST Team and here's to the next million observations!
Sky Guy in VA