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A diagram showing all the round bodies in the solar system with a diameter of less than 10,000 km. If the researchers' proposal is accepted, at least 110 bodies in the solar system will be defined as planets. Source: Montage by Emily Lakdawalla. Data from NASA / JPL, JHUAPL/SwRI , SSI, and UCLA / MPS / DLR / IDA, processed by Gordan Ugarkovic, Ted Stryk, Bjorn Jonsson, Roman Tkachenko, and Emily Lakdawalla.

Why does a group of researchers want to reopen the debate on the definition of planets?

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