Mission specialist Bruce McCandless II, is seen further away from the confines and safety of his ship than any previous astronaut has ever been. This first was made possible by the manned manoeuvring unit, a nitrogen-jet-propelled backpack. After a series of test manoeuvres inside and above Challenger's payload bay, McCandless went "free-flying" to a distance of 320ft from the Orbiter. This panorama view shows McCandless out among the black and blue of Earth and space