The two crew members of the International Space Station (ISS) will move forward their daily routine by three hours a day to prepare for a night space walk on June 2, officials said Saturday.
"By the time of their spacewalk they will be waking at 4:00 pm Moscow time (1200 GMT) instead of 10:00 am and will go to sleep at 7:30 am instead of 1:30 am," a spokesman at mission control centre, Valery Lyndin, told ITAR-TASS news agency.
US astronaut Jeffrey Williams and Russian cosmonaut Pavel Vinogradov will spend about six hours outside the ISS during their space walk.
They will clean an outlet from the ISS' oxygen generation system and update equipment used for experiments, ITAR-TASS said.
Preparations are under way for a visit by the US space shuttle Discovery, which is due to launch from Florida sometime between July 1 and July 19 and is to bring a third long-term crew member, German astronaut Thomas Reiter, representing the European Space Agency.
