Nov 19, 2019 · The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized …

Nov 13, 2024 · Pluto was demoted from a planet to a dwarf planet in 2006. So why is its status still so controversial today?

Pluto is now classified as a dwarf planet because, while it is large enough to have become spherical, it is not big enough to exert its orbital dominance and clear the neighborhood …

Apr 22, 2025 · Why is Pluto no longer a planet? Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union because other objects might cross its orbit.

May 3, 2025 · Pluto—the icy, distant world discovered in 1930, the ninth and once-final planet of our solar system—was reclassified. Overnight, it was no longer a planet.

Nov 8, 2025 · For seventy-six years, Pluto was the ninth planet in our Solar System. It was the smallest, the most distant, and the final member of a family of worlds that children learned in …

Jun 12, 2025 · Pluto isn't considered a planet because, unlike larger planets, it hasn't cleared its orbit of debris, instead it is considered a dwarf planet.

May 28, 2024 · In 2006, astronomers ‘demoted’ Pluto from a major planet in the solar system to a dwarf planet. But was Pluto snubbed? Our experts answer.

Jun 10, 2025 · Once hailed as the solar system’s ninth planet, Pluto was reclassified by the International Astronomical Union after discoveries of numerous Kuiper Belt objects revealed …

Aug 27, 2025 · Why is Pluto not a planet anymore? Learn the science behind Pluto’s reclassification as a dwarf planet, its unique features, and the ongoing debate in astronomy.