[Credit: Ron Garan, ISS Expedition 28 Crew, NASA]
/johnny
According to Gary Boyle, president of the Ottawa chapter of the Royal Astronomical Society of Canada, each streak of light is caused by a piece of dust half the size of a grain or sand or smaller, burning up as it careens into Earths atmosphere at almost 60 kilometres per second.
If I was taking that photo, the "half the size of a grain of sand" would sound good, the "60 kilometres per second" would sound very, very bad.
Nice!