Know the objects
Learn the difference between asteroids, comets, meteoroids, meteors, and meteorites.
Clear public education for asteroids, comets, close approaches, observatory science, emergency communication, and the practical work of protecting Earth. Built for students, families, educators, volunteers, and Planetary Defense Foundation mission supporters.
Learn the difference between asteroids, comets, meteoroids, meteors, and meteorites.
Understand sky positions, follow-up observations, uncertainty, and orbit refinement.
Interpret distance, size, velocity, Torino-scale style context, and why most alerts are informational.
See how observatories, sensors, Raspberry Pi hubs, cameras, and public data streams connect.
Use calm, sourced public communication that separates science updates from emergency instructions.