has long been known for being a digital pioneer, often making photos and videos available as soon as possible. Online, their pics are readily available with complete descriptions and fall under the public domain copyright (NASA is a government agency).
For more info on NASA's image use guidelines, go here
Below are the 10 photos I found to be fascinating, original and memorable from NASA's Image of the Day database from January 2013.
Got a favourite pic? Maybe something else I didn't post?