Delivered to orbit by Endeavour in 2011 on the next-to-last space shuttle flight, the $2-billion spectrometer is hunting for elusive antimatter and dark matter.
It’s already studied more than 148 billion charged cosmic rays. That’s more than what was collected in over a century by high-altitude balloons and small satellites, said lead scientist Samuel Ting, a Nobel laureate at MIT. He monitored Friday’s 6½-hour spacewalk from Mission Control in Houston.
Parmitano, the lead spacewalker, and Morgan trained extensively for the plumbing job before rocketing into orbit in July. They hustled through Friday’s cover removals and even got a jump on future chores.
France Dernières Nouvelles, France Actualités
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