HOUSTON—Two spacewalking astronauts teamed for the second of four planned spacewalks outside the International Space Station (ISS) on Nov. 22 to advance an upgrade of the thermal control system on the Alpha Magnetic Spectrometer (AMS). The more than $2 billion, 8 1/2-year-old cosmic ray observatory was developed to unravel the mysteries of dark matter and search for anti-matter. The third of four planned excursions by Luca Parmitano, of the European Space Agency (ESA), and ...

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