The twice reflected Moon light

[knocker]

American astronaut Ron Garan may be the single best promoter of space exploration we have today, if only because of his breathtaking photographs of the Earth from space. In July 2011, as he orbited our planet in the International Space Station, he took this gorgeous shot of the crescent Moon, setting over the Earth's silhouetted limb:

 

This shows no fewer than three of my favorite optical effects!

 

 

http://www.slate.com/blogs/bad_astronomy/2011/11/19/the_twice_reflected_moon_light.html