Astro_Mike: In space, everyone can hear you tweet

(AP) -- On Twitter, messages of 140 characters may seem confining. Mike Massimino is finding a different type of space even more limiting - outer space.

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<p><a href="http://www.physorg.com/news161537881.html">Astro_Mike: In space, everyone can hear you tweet</a></p> <p>(AP) -- On Twitter, messages of 140 characters may seem confining. Mike Massimino is finding a different type of space even more limiting - outer space.</p>