NASA - National Aeronautics and Space Administration

S131-E-009277 (12 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, watches a water bubble float freely between him and the camera, showing his image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

S131-E-009282 (12 April 2010) --- Japan Aerospace Exploration Agency (JAXA) astronaut Naoko Yamazaki, STS-131 mission specialist, squeezes a water bubble out of her beverage container, showing her image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

S131-E-009285 (12 April 2010) --- Japan Aerospace Exploration Agency (JAXA) astronaut Naoko Yamazaki, STS-131 mission specialist, watches a water bubble float freely between her and the camera, showing her image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

S131-E-009294 (12 April 2010) --- NASA astronaut Alan Poindexter, STS-131 commander, watches a water bubble float freely between him and the camera, showing his image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

S131-E-009299 (12 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, watches a water bubble float freely between him and the camera, showing his image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

S131-E-009302 (12 April 2010) --- NASA astronaut James P. Dutton Jr., STS-131 pilot, exercises on a bicycle ergometer on the middeck of space shuttle Discovery while docked with the International Space Station.