""NASA astronaut Reid Wiseman posted the first-ever zero-gravity Vine in which he captured a rare view of a never-setting sun. Vine is a social website that publishes short videos (around six seconds). The six-second snapshot was taken aboard the International Space Station and shows the sun rising and setting - but never dipping below the horizon. “1st Vine from space!,” Wiseman wrote on his tweet. “Single Earth orbit. Sun never sets flying parallel w/terminator line.”
The terminator line separates light from dark for an observer with his or her feet on solid ground. But from time to time the ISS lines up directly with the line during the space station’s 92-minute lap around Earth, creating the surreal effect seen in Wiseman’s video.
This left the space station in 24-hour sunlight, providing some great marathon space station watching for those people wanting to wave at the guys from the ground.
Astronauts aboard the ISS have made social media a part of their routine since 2009 when astronaut Mike Massimino sent a message to the Johnson Space Center that was then posted on his Twitter feed.""
