NASA Administrator Jared Isaacman testifies during a hearing held by the House Appropriations Subcommittee on Commerce, Justice, Science, and Related Agencies to review NASA's Fiscal Year 2027 budget request, Monday, April 27, 2026, at the Rayburn House Office Building in Washington. (Image credit: NASA/Joel Kowsky) NASA chief Jared Isaacman wants to restore Pluto to its former glory. In 2006, the International Astronomical Union (IAU) stripped Pluto of its planethood , reclassifying the icy world as a "dwarf planet." The decision was controversial, and not just because it forced schoolchildren around the world to learn a new mnemonic for our solar system's major denizens. NASA Administrator Jared Isaacman testifies before the U.S. Senate appropriations committee on April 28, 2026. (Image credit: U.S. Senate Committee on Appropriations) The IAU defined a planet according to three newly pronounced criteria: It has to orbit the sun , be massive enough to be spherical, and clear its orbit of debris.…