6 trends tracked about this subject — the full history, oldest to newest below.
Space dust from beyond Neptune carries water unlike anything on Earth, pointing to a primordial reservoir at the edge of the solar system.
Astronomers have identified a new dwarf planet candidate beyond Pluto, potentially making it the sixth recognized dwarf planet in our solar system.
Rubin Observatory’s first dwarf‑planet candidate, 2026 ED138, emerges beyond Pluto, hinting at a hidden world family.
15 news sources are covering this Science story right now — PULSE is tracking how fast it spreads.
Two decades after Pluto's reclassification as a dwarf planet, scientists and the public are revisiting the debate over what constitutes a planet.
NASA's New Horizons spacecraft wakes from hibernation nearly six billion miles from Earth to continue its mission.