Editor's note: The Soyuz shuttle carrying astronauts Tim Peake (Britain), Tim Kopra (United States) and Yuri Malenchenko (Russia) successfully docked with the International Space Station at 12:33pm ET. Peake is leading a six-month mission called Principia to maintain the weightless research laboratory and run scientific experiments for the ESA and other partners. The Principia mission is named after Isaac Newton's text on physics, "Naturalis Principia Mathematica." - Shelley
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