The Bad Astronomer writes "Today, the B612 Foundation announced it's seeking private funds to build Sentinel, a space mission to find Earth-threatening asteroids. Placed in a Venus-like orbit, it should find a large fraction of these potentially hazardous rocks. At the same time, the NEOCam (Near Earth Object camera) website went live today. This is a separate, publicly-funded space mission also designed to look for these asteroids. While Sentinel will concentrate on finding them and getting accurate positions and orbits, NEOCam will focus more on getting their physical characteristics. While not strictly competing with each other, they are more complementary; with both missions flying (in the 2017 time range) we will learn a huge amount about the asteroid threat from space."
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