this month's gallery for the royal observatory greenich's astronomy photographer of the year challenge was chosen by stuart, who writes the astronomy blog.
my favorite from his temporal gallery was this photo by thierry legault. aside from the necessary timing and technical skills required to capture the ISS just as it passes in front of the sun, the foresight to catch the ISS with the shuttle atlantis docked (on the left) is brilliant! this was the final space flight for atlantis before it was retired.
the clarity of the silhouette is stunning.