Science ❯ Astronomy

Planetary Defense

Near-Earth Objects Asteroids Risk Assessment Impact Events Impact Risk Assessment Impact Risk NASA NASA Missions Impact Mitigation Monitoring Systems

NASA Reaffirms 3I/ATLAS Is a Comet as New Images Intensify Scrutiny Ahead of December Flyby

NASA maintains it is a comet posing no risk to Earth.

New Study Flags Possible Taurid ‘Resonant Swarm’ Risk in 2032 and 2036

NASA and IAWN Activate Coordinated Tracking of Interstellar Comet 3I/ATLAS Ahead of Perihelion

Tiny Asteroid 2025 TF Slipped Past Earth at ISS Altitude Before Detection

Study Flags Hidden Venus Co-Orbitals That Could Drift Into Earth-Crossing Paths

Study Outlines Nuclear or Kinetic Response as Asteroid 2024 YR4 Poses 4% Moon-Impact Risk

Study Flags Hidden Venus Co-Orbital Asteroids as Long-Term Earth Hazard

Hayabusa2 Target 1998 KY26 Is Just 11 Meters Across With 5-Minute Days, Complicating 2031 Visit

Astronomers Confirm Tiny Quasi‑Moon 2025 PN7 Shadowing Earth for Decades

Asteroid 2025 FA22 Safely Speeds Past Earth at More Than Twice the Moon’s Distance

Astronomers Confirm 2025 PN7 as a New Earth Quasi-Moon

China Details Two-Spacecraft Asteroid-Deflection Test Targeted for 2030

China Unveils Two-Spacecraft Test to Nudge an Asteroid’s Orbit

LICIACube Images Show 16 Million-Kilogram DART Ejecta That Drove Dimorphos’ Deflection

Lifetime Asteroid Death Risk Exceeds Rabies but Falls Far Short of Car Crashes

Asteroid 2024 YR4 Poses No Threat to Earth but Holds 4.3% Chance of Moon Impact

Researchers Estimate 3I/ATLAS Interstellar Comet Is Over Seven Billion Years Old

DART Ejecta Analysis Reveals Boulder Clusters Could Tilt Dimorphos’s Orbit

Active Interstellar Comet 3I/ATLAS Set for Safe Solar System Passage

Interstellar Comet 3I/ATLAS Crosses Solar System on 68 km/s Trajectory