Science ❯ Astronomy

Planetary Formation

Protoplanetary Disks Gas Giants Solar System Planetary Characteristics Planetary Evolution Exoplanets Planetary Systems Chemical Composition Planetary Atmospheres Debris Disks

Study Finds Mercury Shrank Up to 14.5 Miles More Than Previously Measured

A reanalysis shows impact debris has hidden many contraction features, implying a larger iron core and prompting model revisions.

Study Says Mercury May Have Shrunk by as Much as 23 Kilometers

Single Asteroid Strike Could Explain Deimos’s Southern Basin and Global Dust

Gas Streamer Likely Tilted GW Orionis' Triple-Star Disk

Webb Detects Clay Minerals on Neptune’s Inner Moons and Rings

Asteroid 44 Nysa Is Likely a Three‑Lobed Body and Has a Small Moon

Massive Gaseous Companion Detected Orbiting Brown Dwarf in CD-35 2722

Webb Detects Hidden Giant Planet Beta Pictoris d Inside Debris Disk

Astronomers Confirm Third Planet in Beta Pictoris, the Faintest Ever Imaged From Earth

VLT Confirms Ancient, Non‑Solar Chemistry in Interstellar Comet 3I/ATLAS

TESS Confirms Two Jupiter‑Sized Super‑Puff Planets

Webb Finds Salt Clouds Veiling the Atmosphere of GJ 504 b

ALMA Finds Deep Carbon Monoxide That Points to an Ice-Rich Uranus

Study Suggests Nereid Is Neptune’s Last Intact Original Moon

NASA’s Psyche Skims Mars for Gravity Assist on Course to Metal-Rich Asteroid

Study Challenges 'Ice Giant' Label for Uranus and Neptune

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

Astronomers Detect Thin Atmosphere on Small World Beyond Pluto

TESS Survey Identifies 27 Candidate Two‑Star Planets

Webb Maps the Surface of a Nearby Super-Earth, Revealing a Dark Basaltic World