Expedition 31 Flight Engineer Don Pettit of NASA has taught more than half a million internet viewers how microgravity affects scientific principles by using everyday objects on the International Space Station.

HOUSTON, May 4, 2012 /PRNewswire-USNewswire/ -- Expedition 31 Flight Engineer Don Pettit of NASA has taught more than half a million internet viewers how microgravity affects scientific principles

HOUSTON, April 27, 2012 /PRNewswire-USNewswire/ -- Three members of the Expedition 30 crew undocked from the International Space Station and safely returned to Earth on Friday, wrapping up a

Did you ever use a flashlight to send a Morse code message to your neighbor at night as a kid? People like to say hello using lights and it's no different for space aficionados who want to twinkle a greeting from the Earth to the International Space Station during a sighting as it passes overhead -- except that it is a whole lot more complicated.

Did you ever use a flashlight to send a Morse code message to your neighbor at night as a kid? People like to say hello using lights and it's no different for space aficionados who want to twinkle a greeting from the Earth to the International Space Station during a sighting as it passes overhead -- except that it is a whole lot more complicated.