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Tim Peake prepares for a spacewalk.
Tim Peake/ESA

Well before most people in the U.S. wake up on Jan. 15, astronauts Tim Peake and Tim Kopra will be very busy, beginning a 6-1/2-hour spacewalk to replace some faulty equipment on the International Space Station and lay cable for the eventual arrival of crew vehicles.

Every spacewalk is something of a heavily-suited, high-risk ballet—manual labor in a place where familiar physical laws are suspended. TIME will stream the spacewalk live, beginning at 6:30 AM, EST.

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