Science ❯ Planetary Science

Planetary Formation

Solar System Rocky Planets Chemical Composition Earth-Moon System Super-Earths Particle Aggregation Magma Oceans Chemical Signatures Protoplanetary Disks Interstellar Objects Formation Processes Moon Formation Theory Cosmic Origins Inner Core Formation Origins of Water Icy Comets Volatiles Delivery Differentiation Processes Chemical Evolution Gravitational Influence Debris Disks Building Blocks of Planets Red Dwarf Stars Lunar Formation Theories Chemical Processes Lunar Formation Exoplanets Stellar Influence Meteorite Impacts Trans-Neptunian Objects Planetesimals Solar System History Isotopes Planetary Characteristics Planetary Destruction

Interstellar Comet 3I/ATLAS Shows Ancient, Cold Origin in JWST and Ground Spectra

New isotopic measurements point to formation in a metal-poor near-30 kelvin environment, suggesting the comet may date from 10–12 billion years ago.

Webb Detects Methane on Interstellar Comet 3I/ATLAS

Interstellar Comet 3I/ATLAS Shows Extreme Heavy-Water Enrichment, Study Finds

ALMA Finds Interstellar Comet 3I/ATLAS Strikingly Methanol‑Rich With Unusual Outgassing

Mars-Mass Iron Bar Discovered Inside the Ring Nebula by New WEAVE Spectrograph

No Alien Signals Detected From Interstellar Visitor 3I/ATLAS in Green Bank Scan

Webb Data Point to Thick Atmosphere on Ultra‑Hot Super‑Earth TOI‑561 b

Scientists Detect Habitable-Zone ‘Super‑Earth’ GJ 251 c Just 18 Light‑Years Away

Ancient Mantle Rocks Reveal Potassium-40 Deficit Linked to Surviving Proto‑Earth

MIT Team Finds Potassium-40 Anomaly That Points to Surviving Proto‑Earth Mantle

New Analysis Finds Asteroid Belt’s Active Mass Shrinking by 0.0088% Per Million Years

The Moon Is Drifting Farther From Earth by 3.8 Centimeters a Year

SwRI Says Interstellar Comet Flybys Are Achievable as 3I/ATLAS Defies Expectations

Simulations Point to Carbon as Trigger for Earth’s Inner-Core Formation

OSIRIS-REx Samples Show Bennu’s Presolar Stardust, Interstellar Organics, and Faster-Than-Expected Weathering