Aug 24, 2011 · Officially, Pluto is still not a planet. But five years after the ruling that demoted the icy object to dwarf planet, people continue struggling with the definition, and the debate...

Dec 30, 2021 · A group of researchers say Pluto was unfairly maligned by a decision to relegate it to "dwarf planet" status — and that we should consider our solar system to have more than 150 planets.

By any geological measure – including the fact that there are surface processes acting on Pluto today – Pluto is a planet. But it’s the International Astronomical Union, not the International …

Nov 13, 2024 · Based on the third requirement, the committee declared that Pluto no longer qualified as a planet because of its position in the cluttered Kuiper Belt, where thousands of objects sit beyond...

Oct 13, 2022 · Pluto, officially a dwarf planet, has surprising complexity on its surface. While certainly a world, not everyone agrees it is a planet.

Sep 7, 2018 · However, in a new study published online Wednesday in the journal Icarus, UCF planetary scientist Philip Metzger, who is with the university's Florida Space Institute, reported that this standard...

Jul 21, 2007 · The discovery that Pluto is a wandering trans-Neptunian object and that many similar bodies exist argues against its status as a major planet.

Feb 18, 2025 · Obviously, many people do care about Pluto's planet status. It should be known that just 4% of the IAU voted on the controversial demotion, and most weren't planetary scientists but other...

Feb 15, 2025 · In 2006, astronomers removed Pluto from the list of planets. But why was this decision made? And could Pluto regain planet status again in the future?

Feb 22, 2017 · Is it important whether the body has an atmosphere? Pluto has an atmosphere and a complex geological surface with mountains and glaciers, but so do some comets. So what should it mean to be a...