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Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

Around the World in 90 Minutes

Explanation: What is it like to circle the Earth? Every 90 minutes, astronauts aboard the International Space Station experience just that. Recently, crew members took a series of light-sensitive videos looking down at night that have been digitally fused to produce the above time-lapse video . Many wonders of the land and sky are visible in the eighteen sequences, including red aurora above green aurora , lights from many major cities, and stars in the background. Looming at the top of the frame is usually part of the space station itself, sometimes seen re-orienting solar panels. Please help create a useful companion guide for this moving video by identifying landmarks, cities, countries, weather phenomena, and even background constellations that appear.

Date November 21, 2011
Credit Video Credit: Expedition 28 & 29 Crews, ISAL , NASA's JSC ;
Compilation and Editing: Michael Knig ; Music: Do Dekor ( Jan Jelinek ), faitiche
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
A service of: ASD at NASA / GSFC,
NASA Science Activation & Michigan Tech. U.