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NASA Chief Wants Pluto Reinstated as a Planet

  • On Tuesday, NASA Administrator Jared Isaacman told the U.S. Senate Committee on Appropriations he is "very much in the camp of 'make Pluto a planet again'" while preparing scientific papers to revisit the classification.
  • The International Astronomical Union reclassified Pluto as a "dwarf planet" in 2006 after establishing criteria requiring objects to orbit the sun, be spherical, and clear their orbital neighborhood of debris.
  • Isaacman aims to escalate a scientific proposal to honor Clyde Tombaugh, the American astronomer who discovered Pluto in 1930, while critics argue the current IAU definition is "unscientific and inconsistent" in its application.
  • California Institute of Technology professor Mike Brown maintains that the IAU holds ultimate authority over planetary definitions, emphasizing that scientists must classify objects based on understanding the solar system rather than nostalgia.
  • NASA is preparing scientific papers to revisit the discussion, building on findings from the 2015 New Horizons flyby that revealed towering ice mountains and the iconic "heart" region on Pluto's surface.
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NASA administrator Jared Isaacman told a committee in the U.S. Senate that the agency works on scientific documents to reopen the discussion on Pluto's status as a planet, according to science-specialized media such as Scientific American and Space.com, in addition to the academic journal Nature. During his appearance, Isaacman indicated that he is “very in favor of making Pluto a planet again” and pointed out that the documents seek to scale up…

Lean Left

Jared Isaacman, the head of Nasa, spoke this week in favor of making Pluto a planet again.

·Copenhagen, Denmark
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Krem2 NewsKrem2 News
+9 Reposted by 9 other sources
Center

Is Pluto a planet? NASA's chief says it should be

Is Pluto a planet? At a U.S. Senate committee hearing this week, NASA's chief shared his thoughts on the decades-long debate. (NASA photo)

·Spokane, United States
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Science Friday broke the news on Thursday, April 2, 2026.
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