Long Exposure Shots of Star Trails as Seen From the International Space Station

Going on the trail of stars from space, astronaut Don Pettit aboard the International Space Station captured these beautiful long exposure shots of star trails as seen from the ISS. Don says the photographs represent a time exposure of 10 to 15 minutes, but since modern cameras allow at best a 30 second exposure, these images we see are a result of a stack of multiple 30-second exposure images stacked together.

ISS crew spots green aurora over the Indian Ocean


Astronauts aboard the International Space Station witnessed this unique and beautiful aurora australis over the southern Indian Ocean last month. Auroras occur when energetic ions from the sun collide with oxygen and nitrogen in the upper atmosphere, exciting these particles to an energy state where they emit light. The aurora borealis occurs near the north pole, while the aurora australis occurs near the south pole. This aurora is unique because it was relatively far from the southern pole. The green aurora probably occurred due to the large energy ejection from the sun on May 24.

Via: NASA, PopSci