In 2010, the ESA Rosetta satellite made a fly-by of the asteroid Lutetia. Lutetia is a remnant of the young solar system, ~100 km across, a chunk of debris cast off in a time of chaos and just-forming planets. Scientists think that it might have been a failed mini-planet, sentenced to wandering the solar system’s inner asteroid belt for the past 3.6 billion years.
Just released images have been compiled into a stunning fly-by video. Wow.
(via Rosetta Blog and Phil Plait)