The US space shuttle Endeavour has successfully undocked from the International Space Station and is now on its journey back to earth. The shuttle undocked from the International Space Station late last night after a stay of nearly two weeks. The six member crew of the shuttle earlier bid goodbye to the three astronauts on board the space station. Astronauts on board Endeavour are expected to arrive at the Kennedy Space Center in Florida early Wednesday. This is the last flight for Endeavour and the next-to-last mission for the US shuttle programme.