Johns Hopkins astrophysicist Kevin Schlaufman has proposed a new definition of a planet. Photo: Johns Hopkins University Science, Space Johns Hopkins Scientist Proposes New Definition of a Planet by eNews Park Forest on January 26, 2018 eNews Park Forest Author More in Science: Wilmington Man’s Photo of Rare Snowy Egret Wins Forest Preserve Photo Contest June 8, 2026 Cook County Announces Free 2026 Vets and Pets Rabies Vaccine and Microchip Clinics May 30, 2026 On Hantavirus, Park Forest Officials Urge Caution May 18, 2026 Johns Hopkins astrophysicist Kevin Schlaufman has proposed a new definition of a planet. Photo: Johns Hopkins University