Science ❯ Astronomy ❯ Planetary Science

Planetary Formation

Exoplanets Mars Formation Pluto and Charon Planet Y Planetary Evolution Building Blocks of Planetary Systems Cosmic Fossils Giant Impact Hypothesis Evaporation Processes Solar System Origins

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

Multiwavelength data show visible dimming with an infrared spike, signaling hot debris from an impact.

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

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

Late-Blooming Rocky World, JWST Chemistry Recast Planet Formation

Inside-Out Exoplanet System Around Red Dwarf LHS 1903 Challenges Formation Models

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

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

New Models Suggest Uranus and Neptune May Be Far Rockier Than Long Assumed

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

Princeton Study Points to Possible Distant ‘Planet Y’ Shaping Kuiper Belt Orbits

Seismic Reanalysis Finds Mars’ Mantle Packed With Ancient Impact Debris

Nature Study Confirms the Moon Has a Solid Inner Core

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

Astronomers Unveil Disintegrating Exoplanet with Record-Breaking Dust Tail

Astronomers Discover Rare Disintegrating Exoplanet with Massive Dust Tail