NASA's Planetary Defense Coordination Office tracks NASA's planetary defense efforts, near-Earth object close approaches, and other key facts about comets and asteroids that could pose an impact hazard with Earth. The infographic above reflects data as of December 2025.
Each month, NASA’s Planetary Defense Coordination Office releases a monthly update featuring the most recent figures on NASA’s planetary defense efforts, near-Earth object close approaches, and other timely facts about comets and asteroids that could pose an impact hazard with Earth. Here is what we've found so far.
Updated: December 3, 2025
