NASA @NASA
LIVE NOW: @AstroAnnimal and @AstroHague venture outside the @Space_Station for a #spacewalk to replace nickel-hydrogen batteries with newer, more powerful lithium-ion batteries for the power channel on one pair of the station’s solar arrays. Watch: https://t.co/QPKj6ZiZtw https://t.co/CcuYqk0XIG — PolitiTweet.org