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Celestial Mechanics

Orbital Dynamics Lunar Phases Trajectory Analysis Comets Eclipses Gravitational Interactions Solar System Earth-Moon System Planetary Orbits Gravitational Forces

Hubble Spots First Known Comet Spin Reversal

Uneven gas jets likely flipped the small comet's spin.

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March 20 Equinox: Spring Begins in the North as Officials Publish Exact Times

DART Impact Measurably Nudged Asteroid Pair’s Orbit Around the Sun, Study Confirms

Webb Observations Eliminate 2032 Lunar-Impact Risk From Asteroid 2024 YR4

Six-Planet Parade Lines Up Along the Ecliptic as Jupiter Shines Brightest

Six Planets To Line Up After Sunset Feb. 28–Mar. 1

New Simulations Show Gravitational Collapse Can Build Kuiper Belt 'Snowman' Worlds

NASA Maps Out March 3 ‘Blood Moon,’ the Last Total Lunar Eclipse Until 2028

Annular ‘Ring of Fire’ Eclipse Peaks Today, Fully Visible Only From Antarctica

Study Links Titan’s Moon‑Merger Origin to Saturn’s Young Rings

TESS Reobserves Interstellar Comet 3I/ATLAS After Safe-Mode Gap

Kepler Data Reveal Earth-Size Planet Candidate HD 137010 b Near Star’s Habitable Edge

NASA Clarifies "Second Moon" Hype: 2025 PN7 Is a Quasi‑Satellite, Not an Earth Moon

Six Planets Will Cluster in the Sky Around February 28, 2026

Nature Study Weighs Four Young V1298 Tau Planets, Revealing Ultra‑Low Densities

Hubble Data Tie Betelgeuse’s 6-Year Variations to Hidden Companion’s Gas Wake

Quadrantid Meteor Shower Peaks Under Bright Supermoon

January Night Sky: Jupiter’s Opposition Leads a Busy Month for Central Europe

Earth’s Day Is Slowly Lengthening as Climate Shifts Accelerate a Subtle Spin Slowdown

Interstellar Comet 3I/ATLAS Makes Safe, Distant Pass by Earth