INTERNATIONAL SPACE STATION — NASA astronaut Scott Kelly posted a photo of a UFO to his Twitter account, and alien theorists are having a field day.\r
\r
Aboard the International Space Station, Expedition 45 Commander Scott Kelly of NASA discussed life and research aboard the orbital laboratory with .\r
\r
Join ESA astronaut Samantha Cristoforetti as she shows how astronauts on the International Space Station keep clean. From soap to water and cutting your .\r
\r
Former International Space Station commander Suni Williams has lifted the lid on how astronauts aboard the orbital module go to the toilet. Personnel aboard .
