article_snippet: On Earth, scientists will perform parallel studies on Scott Kelly identical twin brother, retired astronaut Mark Kelly.
article_snippet: It's a lot of fun,Scott Kelly Scott Kelly said at a media briefing in January.
article_snippet: Kelly will document Kelly feelings about being away from Kelly two children and the rest of Kelly family.
article_snippet: I'm going to keep a personal journal of the experience," Kelly said.
article_snippet: Kelly also will share some of Kelly journal with researchers studying the psychological impacts of long-term space flight.
article_snippet: I plan to be completely honest about it," Kelly said, but ... "who knows, maybe there are some crazy thoughts I'll have at the end that I wouldn't want to share.
article_snippet: Kelly has volunteered for NASA's "Twins Study" to see how the identical twins change over the year in two very different environments.
article_snippet: Kelly is the husband of former U.S. Rep. Gabrielle Giffords of Arizona, who left office after being wounded in a January 2011 assassination attempt.
article_snippet: Kelly thinks it's great that Kelly can still be a participant in this," Kelly said.