The cross marks the spot for Rosetta's Philae Lander - or Site J as ESA calls it (See yesterday's blog). This was one of five sites selected from a larger list that ESA had compiled and studied.
ESA has just announced its selection of the landing site and it will be a combination of safe landing probabilities and high science return for Philae.
The landing will take place in November 2014.
Sky Guy in VA