• December 10, 2009
Welcome to the tenth post in my "Advent Calendar" -- I am opening a door each day on a different world in the solar system, and I'll be continuing to do so until New Year's Day.
Become a member of The Planetary Society and together we will create the future of space exploration.
LightSail 2 launched aboard the SpaceX Falcon Heavy. Be part of this epic point in space exploration history!