NASA NASA Missions International Space Station European Space Agency ESA Spacecraft Technology ESA Missions Crewed Missions James Webb Space Telescope Crewed Space Missions Boeing Starliner SpaceX Cassini Chandrayaan-3 Astronauts Crewed Spaceflight Cassini Mission Voyager Program International Space Station (ISS) Artemis Program Mars Missions Rocket Launches International Collaboration XRISM Europa Clipper Mars Express Space Capsules Astronaut Activities Astronaut Training Spacecraft Euclid Mission JUICE Mission ISRO Solar Orbiter Satellite Launches Hubble Space Telescope Crewed Flight Payloads XMM-Newton Test Flight Astronaut Missions BepiColombo Rocket Launch JAXA Private Spaceflight Human Spaceflight VERVE Mission Einstein Probe Voyager 2 Juno Mission Sample Collection Observatories Japanese Space Missions JUICE Soyuz Program Launch Vehicles Axiom Missions Hayabusa2 Voyager Missions ESA Mars Express Juice Mission Cassini-Huygens BepiColombo Mission Private Space Missions Boeing Starliner Mission Moon Missions Cargo Missions Manned Space Missions Commercial Spaceflight Hayabusa-2 Sample Analysis Earth Observation Ignis Mission History Long-Distance Missions Telescopes Venera Program Launch Schedule SpaceX Starship Axiom-4 Commercial Crew Missions Biological Research Experiments JUICE Probe Solar Studies Astronaut Experiences SwRI Missions Mission Logistics Polaris Program NASA Europa Clipper Deep Space Optical Communications New Horizons Historical Missions Manned Missions Test Flights Monitoring Techniques Boeing Satellites Venera Mission Rosetta Mission
Scientists remain divided over the IAU’s ‘cleared neighborhood’ rule and New Horizons’ evidence of active geology, leaving the 2006 classification in place and the debate ongoing.