They did it today: Philae on the comet 67P/C-G

AUG. 20 A white cross marks Philae’s intended landing site on the comet’s head.
http://www.nytimes.com/interactive/2014/11/12/science/space/rosetta-philae-comet-landing.html

And yesterday night I opportunely went to see Interstellar the beautiful movie by C Nolan.