Two Mercury-bound spacecraft are in the home stretch of their nearly decade-long voyage. The linked spacecraft — one European, the other Japanese — separated from their mother ship on Thursday. If all goes well, they'll enter orbit around Mercury in November …
CAPE CANAVERAL, Fla. (AP) Two Mercury-bound spacecraft left their mother ship behind on Thursday and headed down the home stretch of their nearly decade-long voyage to the solar systems smallest and … [+2848 chars]