This Massive Gas Giant Orbiting a Tiny Red Dwarf Tests Our Planet Formation Theories

The discovery of a Saturn-sized gas giant orbiting a small red dwarf is urging astronomers to reconsider their theories of planet formation. Core accretion theory is the most widely accepted explanation for planetary formation. It describes how planet formation begins with tiny dust grains gathering together and forming planetary cores that grow larger through accretion. It explains much of what we see in our Solar System and others. This discovery introduces some doubt.

Jun 6, 2025 - 00:44
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This Massive Gas Giant Orbiting a Tiny Red Dwarf Tests Our Planet Formation Theories

The discovery of a giant planet orbiting a small red dwarf is challenging the core accretion theory of planet formation. Image Credit: University of Warwick/Mark Garlick

The discovery of a Saturn-sized gas giant orbiting a small red dwarf is urging astronomers to reconsider their theories of planet formation. Core accretion theory is the most widely accepted explanation for planetary formation. It describes how planet formation begins with tiny dust grains gathering together and forming planetary cores that grow larger through accretion. It explains much of what we see in our Solar System and others. This discovery introduces some doubt.