Science ❯ Astronomy

Orbital Dynamics

Quasi-Satellites High-Eccentricity Migration Eccentric Orbit Sednoids NEOs Geostationary Orbits Satellite Drift Gravitational Interactions Orbital Evolution Gravitational Influence Ecliptic Plane Transit Timing Variations Space Debris Lunar Standstill Asteroid Tracking Lunar Cycles Earth's Orbit Space Weather N-Body Simulations Micromoon Moon Orbit Satellite Coverage

The Moon Is Drifting Farther From Earth by 3.8 Centimeters a Year

Tidal forces slowly push the Moon outward, lengthening Earth's day over deep time.

Discovery of 'Ammonite' Narrows Search for Planet Nine

New Distant Sednoid ‘Ammonite’ Casts Doubt on Planet Nine Hypothesis