Science ❯ Astronomy

Celestial Mechanics

Orbital Dynamics Lunar Phases Comets Trajectory Analysis Eclipses Gravitational Interactions Solar System Gravitational Effects Trajectory Moon Phases

Study Finds Tenuous Atmosphere on a Small Kuiper Belt World

Upcoming observations will test whether the gas is sustained internally or left by a recent impact.

Falcon 9 Upper Stage Predicted to Strike Moon Near Einstein Crater on August 5

NASA Confirms Aug. 2, 2027 Total Solar Eclipse With 6 Minutes 22 Seconds of Totality

Sungrazer Comet MAPS Faces Make-or-Break Sun Brush April 4–5

Hubble Spots First Known Comet Spin Reversal

Hubble Confirms First-Ever Spin Reversal of Comet 41P

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

NASA’s DART Test Measurably Shifted an Asteroid System’s Solar Orbit, Studies Find

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

Total Lunar Eclipse Tonight Favors Pacific, East Asia and Western North America

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

Six-Planet ‘Parade’ Peaks Tonight in Brief Twilight Window

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