Science ❯ Astronomy ❯ Planetary Science

Planetary Formation

Exoplanets Mars Formation Pluto and Charon Planetary Evolution Planet Y Protoplanets Moon Formation Venus Rocky Planets Triaxial Shape Asteroids Impact Craters Debris Discs Cosmic Collisions Kiss and Capture Mechanism Giant Planets Planetary Destruction Solar System Origins Collisions Star Systems Volcanic Moons Core Formation Planet-Forming Disks Outer Solar System Planetary Accretion Planetary Demise Planetary Engulfment Mechanisms Orbital Dynamics Evaporation Processes Debris Trails Planetary Decay Solar System Formation Atmospheric Loss Cosmic Fossils Cosmic Debris Cryovolcanism Binary Star Systems Rocky Planets with Metallic Cores Cosmic Dust Impact Simulations Small Bodies Exoplanetary Systems Uranus and Neptune Extraterrestrial Materials Planetary Collisions Building Blocks of Planetary Systems Planetary Building Blocks Giant Impact Hypothesis Theia Lunar Formation Isotopic Analysis Planetary Architectures Frost Line Debris Disks Jupiter's Moons Massive Moons Moon Mergers Origins of Planetary Rings Substellar Objects Mercury's Density Giant Impact Theory

Venus Likely Lost a Moon to Tidal Drag, Study Finds

Simulations tie Venus’s missing moon to the planet’s slow rotation that pulls satellites inward, leaving planned Venus missions to test the idea.

Simulations Show Moon Could Have Formed Intact in Hours After Giant Impact

Lunar Meteorite Preserves Evidence of a 3.5-Billion-Year-Old Giant Moon Impact

Sahara Meteorite Points to Moon‑Size Lost Protoplanet

Psyche Gains 1,000 mph in Mars Flyby and Stays on Course for Metal Asteroid

JWST Finds Heavy, Water-Rich Atmosphere on Mini-Neptune in Rare Hot-Jupiter System

Astronomers Tie Distant Star’s Chaotic Fading to Evidence of a Planetary Collision

New Study Links Titan Moon Merger to the Birth of Saturn’s Rings

Astronomers Find Rare ‘Inside-Out’ Planetary System With Rocky Outer World

Rocky Outer Planet in LHS 1903 System Upends Planet-Formation Models

ALMA’s ARKS Survey Delivers Sharpest-Ever Map of 24 ExoKuiper Belts

Study Challenges 'Ice Giant' Label for Uranus and Neptune

SPHERE Survey Delivers 51 Resolved Debris Disks, Revealing Planet-Shaped Rings and Prime Follow-Up Targets

Study Traces Moon-Maker Theia to the Inner Solar System

Science Study Points to Inner‑Solar‑System Origin for Moon‑Forming Impactor Theia

Seismic Reanalysis Finds Mars’ Mantle Packed With Ancient Impact Debris

Psyche Spacecraft Snaps Distant Earth–Moon Portrait During Instrument Checkout

Chandra Observations Reveal Rapid Atmospheric Loss on Exoplanet TOI 1227b

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