(from Bad Astronomy)
Hermit mathematician refuses prize -- *this* is the guy who solved the Poincaré conjecture? I know genius often goes hand in hand with eccentricity, but still...
A History of the Sky -- A time-lapse visualization of the sky over San Francisco for an entire year, from various locations. A work in progress, but *very* cool.
21 UNBELIVABLE pictures of Mars -- avalanches, ice, dust storms, and beauty beyond comparison. Pictures like these keep me going.