Uncanny X-Men (1963) #536

"BREAKING POINT" When the X-Men left the militaristic alien Breakworld, its political structure was reduced to ashes. It didn't stay that way forever. Now a warship is crossing the gulf of space, with a mission that will strike the lives of star-crossed lovers Colossus and Kitty Pryde with all the force of a meteor. Join them as they discover what the vessel them means for them, mutantkind and the rest of the Earth. All courtesy of KIERON GILLEN and TERRY DODSON!  Part 1 (of 4).