NASA - Open Source Geographic Information

NASA has released World Wind as an open source program to improve its quality through peer review, maximize awareness and impact of NASA research, and increase dissemination of World Wind in support of NASA's mission: To inspire the next generation of explorers ... as only NASA can.
NASA Learning Technologies is a NASA R&D effort for the engineering of teaching tools that deliver NASA content in the most engaging and dynamic manner possible. NASA LT builds the pipeline and the delivery point for unencumbered access to the best data NASA has to provide.