Accelerate progress in our three core enterprises — Explore Worlds, Find Life, and Defend Earth. You can support the entire fund, or designate a core enterprise of your choice.
Asteroid 3200 Phaethon These radar images of near-Earth asteroid 3200 Phaethon were generated by Arecibo Observatory's planetary radar system. Radar enables scientists to precisely determine important characteristics of near-Earth objects, including their orbit, rotation, and size. Arecibo Observatory/NASA/NSF