“Star trails over Green Lake” by Dan Barr

Astronomy Photographer of the Year 2015

Star trails illuminate the night sky over a campfire-lit Green Lake in the Hoover Wilderness of California. Star trails are a popular subject for astrophotographers to capture using long-exposure times. Whilst they appear to illustrate the movement of the stars, they are in fact depicting the rotation of the Earth on its axis. Image credit: © Dan Barr / Royal Museums Greenwich. (Click image for full-size version.)
Star trails illuminate the night sky over a campfire-lit Green Lake in the Hoover Wilderness of California. Star trails are a popular subject for astrophotographers to capture using long-exposure times. Whilst they appear to illustrate the movement of the stars, they are in fact depicting the rotation of the Earth on its axis. Image credit: © Dan Barr / Royal Museums Greenwich. (Click image for full-size version.)
The Insight Astronomy Photographer of the Year competition is an annual celebration of the most beautiful and spectacular visions of the cosmos by astrophotographers worldwide. In 2015 the competition launched for its seventh year, with new categories and more prizes up for grabs. With over 2700 spectacular entries from over 60 countries, it’s been the toughest year yet for the judges.

Over the coming weeks we will feature, in no particular order, each of the final 16 selected images and winners will be announced by Royal Museums Greenwich on 17 September. The winning images are to be showcased at the Royal Observatory Greenwich in an exhibition opening 18 September.