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All articles tagged with "planet formation"

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Interstellar comet 3I/ATLAS contains strange water never seen in our solar system

Interstellar comet 3I/ATLAS carries heavy water unlike anything seen in the solar system

3I/ATLAS is only the third confirmed interstellar visitor detected.
Researchers found unusually high deuterium levels in its water.
The chemistry suggests the comet formed in much colder conditions than our solar system.

DE

DT Editorial Team·May 8, 2026·via sciencedaily.com

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This artist's illustration shows the sub-stellar object 29 Cygni b. It's about 15 times more massive than Jupiter and orbits at a great distance from its star. It straddles the dividing line between star and planet. Image Credit: NASA, ESA, CSA, Joseph Olmsted (STScI)

JWST spots an object that blurs the boundary between planet and star

JWST directly imaged 29 Cygni b, a 15-Jupiter-mass object near the planet-star boundary.
Its mass suggests a star-like classification, but detected heavier elements point toward planetary formation.
The object highlights why formation history may matter more than mass alone.

DE

DT Editorial Team·Apr 16, 2026·via universetoday.com

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This artist's illustration shows the gas giant TOI-5205 b orbiting its M-dwarf (red dwarf) star. Astronomers expect to find massive gas giants around more massive stars than this, so this arrangement is a puzzle. It's not the only gas giant around a low-mass star, and collectively, they challenge astronomers' understanding of planet formation. Image Credit: Katherine Cain, Carnegie Science.

A Giant Planet Around a Tiny Star Is Testing Theories of How Worlds Form

TOI-5205b is a roughly Jupiter-mass planet orbiting a low-mass M-dwarf every 1.6 days.
Its size and host-star mass strain standard disk-scaling expectations in planet formation theory.
Researchers are now studying similar systems with JWST through the GEMS program.

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DT Editorial Team·Apr 12, 2026·via universetoday.com

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Using the W.M. Keck Observatory, astronomers investigated the long-predicted relationship between mass and spin for giant planets and brown dwarfs. Credit: NASA/JPL-Caltech

Survey of exoplanet spins backs long-predicted link between mass and rotation

Researchers used Keck Observatory data and prior measurements to compare spin across exoplanets and brown dwarfs.
The survey supports a long-predicted relationship between mass and rotation.
Gas giant planets were found to spin faster than more massive brown dwarf counterparts after accounting for mass, size, and age.
Scientists say spin can preserve clues about how distant worlds formed.

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DT Editorial Team·Apr 8, 2026·via universetoday.com

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Rocky planet discovered in outer orbit challenges planet formation theory

Rocky Planet Found in Outer Orbit Defies Planet Formation Theory

A rocky planet was found orbiting beyond the snow line where only gas giants were predicted by the core accretion model
The planet's orbital distance is comparable to Jupiter's position in our solar system but lacks a gaseous envelope
The discovery may expand the zones where astronomers search for potentially habitable Earth-like worlds

DE

DT Editorial Team·Feb 14, 2026·2 min read·via sciencedaily.com

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