Georgia Tech's Prox-1 spacecraft has arrived at the Air Force Research Laboratory in Albuquerque, New Mexico, where it will be integrated with LightSail 2. The SmallSats will ride to orbit on a SpaceX Falcon Heavy rocket in December 2017 or later.
The Space Launch System and Orion won't fly until 2019, and NASA is sticking with its original plan not to include astronauts for the maiden mission. Here is a timeline of some of the programs' major twists and turns over the years.
The Planetary Society's LightSail project has roots in a late-1970s NASA plan to send a giant solar sail spacecraft to Halley's Comet. Now, a cache of archival documents adds new depth to the audacious plan.