Usually ‘X’ marks the spot, but for the ESA’s Rosetta orbiter, Site ‘J’ has been selected as the place where its Philae lander will touch-down on Comet 67P/Churyumov–Gerasimenko (67P/C-G), officials at the agency announced on Monday. Rosetta, which is the first mission to ever rendezvous with a comet, will accompany 67P/C-G on its journey throughout the…