NASA Administrator Jared Isaacman Advocates for Reclassifying Pluto as a Planet
On April 28, during a Senate hearing, NASA Administrator Jared Isaacman voiced his support for the movement to reclassify Pluto as a planet, coinciding with proposed NASA budget cuts from the Trump Administration. He highlighted ongoing scientific research that disputes the 2006 IAU ruling that demoted Pluto, advocating for the acknowledgment of its discoverer, Clyde Tombaugh, who identified Pluto in 1930. Pluto was labeled a dwarf planet for not fulfilling the IAU's criteria, particularly its inability to clear its orbital neighborhood. Critics, including David Grinspoon and Philip Metzger, contend that the definition is inadequate. Isaacman underscored Pluto's American heritage, asserting, "we owe it to everyone from Kansas... to rightfully restore that discovery to a planet."
Key facts
- NASA Administrator Jared Isaacman said he is 'very much in the camp of make Pluto a planet again' during a Senate hearing on April 28.
- Isaacman's remarks were made during a hearing over the Trump Administration's proposed budget cuts to NASA.
- Pluto was discovered by American astronomer Clyde Tombaugh in 1930 at Lowell Observatory in Flagstaff, Arizona.
- The International Astronomical Union (IAU) reclassified Pluto as a dwarf planet in 2006.
- The IAU's 2006 definition requires a planet to orbit the sun, have enough mass for a round shape, and clear its orbital neighborhood of debris.
- Pluto fails the orbit-clearing criterion, leading to its demotion.
- The discovery of Eris in 2005, a body more massive than Pluto, prompted the IAU to establish the dwarf planet category.
- In 2024, three planetary scientists proposed a quantifiable planet definition with a mass range that excludes Pluto.
- Catherine Cesarsky, IAU president from 2006 to 2009, defended the 2006 decision.
- David Grinspoon and Philip Metzger have criticized the IAU definition as flawed.
Entities
Institutions
- NASA
- International Astronomical Union (IAU)
- Lowell Observatory
- Planetary Science Institute
- University of Central Florida
- Nature
- Daily Mail
- Science News
- Smithsonian Magazine
Locations
- Flagstaff
- Arizona
- Illinois
- Kansas
- United States