One of the most incredible Astrophotos I've seen.
via Bad Astronomy
That's the ISS (International Space Station) transiting the full moon. Extraordinarily difficult to get! The quality of the picture is remarkable. What makes it even more impressive is the duration of the ISS in front of the moon from the guy's location is just 0.55 seconds! He had to get it just right first time!
Click on the image to enlarge.
And to see a REALLY big image, check out Astrosurf.