New Limit on the Definition of a Planet Proposed

Conclusions in new paper reportedly based on observations of 146 solar systems

Image Credits: NASA Ames/SETI Institute/JPL-Caltech / Wikimedia Commons.

Pluto hogs the spotlight in the continuing scientific debate over what is and what is not a planet, but a less conspicuous argument rages on about the planetary status of massive objects outside our solar system.

The dispute is not just about semantics, as it is closely related to how giant planets like Jupiter form.

Johns Hopkins University astrophysicist Kevin Schlaufman aims to settle the dispute.

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