When the NASA space shuttle Endeavour launches Saturday morning, it will carry the 500th human to ever visit outer space. The Endeavour and its seven-person crew will rendezvous with the International Space Station and its six residents. The 13-person get-together will be the largest assembly of humans ever in space.
Endeavour is set to launch at 7:17 a.m. Eastern on Saturday. The entire crew—including Americans, Canadians, Europeans, Russians and Japanese—will spend 16 days adding on to the International Space Station.