JSC2010-E-110183 (26 July 2010) --- Robonaut 2 – or R2 for short – is now on tweeting at www.twitter.com/AstroRobonaut. With the help of its team, the robot sent its first tweet on July 26. R2 will be traveling to the International Space Station aboard Discovery as part of the STS-133 mission. Photographer: Joe Bibby

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Taken on July 22, 2010