NASA Administrator Jared Isaacman has reignited the debate over Pluto's planetary status, stating that he believes the dwarf planet should be reclassified as a full planet. Isaacman made the comments during a press conference on April 29, 2026, saying, 'I think Pluto is a planet. The science is clear that it's a complex world with mountains, ice, and an atmosphere.'
The International Astronomical Union (IAU) reclassified Pluto as a dwarf planet in 2006, a decision that has been controversial ever since. The IAU's definition requires a planet to orbit the Sun, be spherical, and have 'cleared its neighborhood' of other objects. Pluto fails the third criterion because its orbit overlaps with the Kuiper Belt.
Isaacman's statement is not an official NASA policy change, as the agency typically follows the IAU's classification. However, his position has drawn support from some planetary scientists who argue that the 'cleared neighborhood' rule is arbitrary and excludes many interesting worlds. No official process to change Pluto's status has been announced.
