NASA chief Jared Isaacman says he's fighting for Pluto: 'I am very much in the camp of 'make Pluto a planet again'

NASA Administrator Jared Isaacman has publicly advocated for restoring Pluto’s status as a planet, challenging the International Astronomical Union’s (IAU) 2006 decision to reclassify it as a dwarf planet. During a Senate appropriations committee hearing on NASA’s 2027 budget, Isaacman expressed support for revisiting Pluto’s classification, emphasizing the need to honor Clyde Tombaugh, the astronomer who discovered Pluto in 1930. Isaacman indicated that NASA is working on scientific papers aimed at reigniting the debate within the astronomical community. The IAU’s 2006 definition of a planet requires an object to orbit the sun, be spherical in shape, and clear its orbital neighborhood of debris. Pluto meets the first two criteria but was demoted because it shares its orbit with other objects in the Kuiper Belt. Critics, including Isaacman and other Pluto supporters, argue that this criterion is inconsistently applied, noting that Earth and Jupiter also share their orbits with numerous asteroids. This inconsistency has fueled ongoing controversy and public affection for Pluto, particularly in the United States, where it remains a cultural icon. Pluto’s planetary status has been a subject of debate since NASA’s New Horizons mission provided unprecedented close-up images in 2015, revealing a complex and geologically diverse world. Features such as towering mountains, nitrogen-ice glaciers, and the heart-shaped Tombaugh Regio have deepened scientific interest and public fascination. Despite these discoveries, the IAU has not reversed its decision, leaving the question of Pluto’s classification open to further scientific discussion and consensus. Isaacman’s stance highlights the broader conversation about how celestial bodies are defined and classified, reflecting evolving scientific understanding and cultural values. While NASA can advocate and contribute to the dialogue, the ultimate authority on planetary definitions remains with the IAU, whose decisions shape educational materials and scientific frameworks worldwide. The renewed push to reconsider Pluto’s status underscores the dynamic nature of planetary science and the enduring legacy of its discovery.