Astronauts Are On a Spacewalk Right Now to Repair a Crucial Dark Matter Experiment GizmodoWatch live: Astronauts start spacewalk series to fix cosmic ray detector msnNOWISS astronauts are having a much more stressful Friday than you are BGRAstronauts on complex spacewalk prepare AMS cosmic ray detector for repair collectSPACE.comAstronauts start spacewalk series to fix cosmic ray detector Phys.orgView full coverage on Google News