13 Nov 2014 - Rosetta's Comet Lander Landed Three Times

[NASA]

http://solarsystem.nasa.gov/missions/images/miss-rosetta-mp.jpg (http://solarsystem.nasa.gov/news/display.cfm?News_ID=48441)13 Nov 2014 - Rosetta's Comet Lander Landed Three Times
On Wednesday, Nov. 12, the European Space Agency's Rosetta mission successfully landed on the surface of comet 67P/Churyumov-Gerasimenko. Descending at a speed of about 2 mph (3.2 kilometers per hour) the lander, called "Philae," first touched down ...


More... (http://solarsystem.nasa.gov/news/display.cfm?News_ID=48441)

[bodhii71]

Why is it that NASA can never have 100% efficiency with their instruments?
"eight out of 10 instruments have already begun sending back data."

[Linda Brown]

Try being millions of miles away from home.... consider the things that can go wrong when a simple robot vacuum cleaner can have problems!

The fact that they get anything to operate properly is amazing... but of course...

we will never hear about the complete and utter failure of systems that do malfunction. I think that their 8 out of 10 is a suspiciously high mark to me.