Near-Earth Object Count Updated | Planetary Defense: By the Numbers

Uploaded November 2022 | Updated September 2026, 2 weeks ago

☄️ What do we know about the asteroids and comets in Earth's neighborhood? Planetary defense — which includes finding, tracking, and characterizing these near-Earth objects — is part of our mission. Here's what we've found so far.

Learn more about Planetary Defense at NASA: nasa.gov/planetarydefense

Near-Earth Object Count Updated | Planetary Defense: By the Numbers - November 2022

Protecting Mars from Earth Bacteria — Behind the Spacecraft — Perseverance

From Colombia to Mars — Behind the Spacecraft — Perseverance

Planetary Defense: By the Numbers - June 2021

NASA Administrator Jim Bridenstine - Introducing NASA Home & City

CubeSats to the Moon and Beyond: NASA Challenge Winners Will Hitch a Ride on Artemis I

Solar Surfing | A Clever Concept for Keeping Sun-Studying Spacecraft Safe

NASA Competition Winners Develop New Technologies

Excavating the Moons Icy Regolith — We Want YOUR Ideas