[{"n": "Hypothetical astronomical object", "u": "/e/hypothetical-astronomical-objects/hypothetical-astronomical-object/", "s": "Unconfirmed celestial bodies proposed throughout history."}, {"n": "Antimatter comet", "u": "/e/hypothetical-astronomical-objects/antimatter-comet/", "s": "Hypothetical comets of antimatter, never observed, proposed to explain phenomena."}, {"n": "Chrysalis (hypothetical moon)", "u": "/e/hypothetical-astronomical-objects/chrysalis-hypothetical-moon/", "s": "Hypothetical moon whose breakup may have created Saturn's rings."}, {"n": "Claimed moons of Earth", "u": "/e/hypothetical-astronomical-objects/claimed-moons-of-earth/", "s": "Historical claims of additional Earth moons remain unconfirmed."}, {"n": "Coatlicue (star)", "u": "/e/hypothetical-astronomical-objects/coatlicue-star/", "s": "Hypothetical massive star that may have birthed the Sun."}, {"n": "Cosmic string", "u": "/e/hypothetical-astronomical-objects/cosmic-string/", "s": "Hypothetical 1D defects from early universe symmetry breaking."}, {"n": "Dark galaxy", "u": "/e/hypothetical-astronomical-objects/dark-galaxy/", "s": "Hypothetical galaxies of dark matter, invisible to optical telescopes."}, {"n": "Disrupted planet", "u": "/e/hypothetical-astronomical-objects/disrupted-planet/", "s": "A planet destroyed by a star or black hole."}, {"n": "Dyson–Harrop satellite", "u": "/e/hypothetical-astronomical-objects/dyson-harrop-satellite/", "s": "Hypothetical satellite generating power from the solar wind."}, {"n": "Exomoon", "u": "/e/hypothetical-astronomical-objects/exomoon/", "s": "Extrasolar moons remain unconfirmed but are theorized and sought."}, {"n": "Fifth Giant", "u": "/e/hypothetical-astronomical-objects/fifth-giant/", "s": "Hypothetical ice giant ejected from the early Solar System."}, {"n": "Fifth planet (hypothetical)", "u": "/e/hypothetical-astronomical-objects/fifth-planet-hypothetical/", "s": "Hypothetical former fifth planet between Mars and Jupiter."}, {"n": "Five-planet Nice model", "u": "/e/hypothetical-astronomical-objects/five-planet-nice-model/", "s": "A revised model of early Solar System evolution with five giant planets."}, {"n": "Gaia Sausage", "u": "/e/hypothetical-astronomical-objects/gaia-sausage/", "s": "Remains of a dwarf galaxy that merged with the Milky Way."}, {"n": "Galaxy X (galaxy)", "u": "/e/hypothetical-astronomical-objects/galaxy-x-galaxy/", "s": "A hypothesized dark dwarf galaxy behind the Milky Way's disk."}, {"n": "Hubble bubble (astronomy)", "u": "/e/hypothetical-astronomical-objects/hubble-bubble-astronomy/", "s": "A local void causing faster cosmic expansion near Earth."}, {"n": "Hycean planet", "u": "/e/hypothetical-astronomical-objects/hycean-planet/", "s": "Hypothetical planets with hydrogen atmospheres and liquid water oceans."}, {"n": "Hyperbolic asteroid", "u": "/e/hypothetical-astronomical-objects/hyperbolic-asteroid/", "s": "Asteroids with unbound solar orbits and no outgassing."}, {"n": "Hypothetical moon of Mercury", "u": "/e/hypothetical-astronomical-objects/hypothetical-moon-of-mercury/", "s": "A suspected moon of Mercury was actually a star."}, {"n": "Isotropic beacon", "u": "/e/hypothetical-astronomical-objects/isotropic-beacon/", "s": "Hypothetical uniform EM beacon for interstellar communication."}, {"n": "M32p", "u": "/e/hypothetical-astronomical-objects/m32p/", "s": "Hypothesized former galaxy merged into Andromeda 2 billion years ago."}, {"n": "Messier 102", "u": "/e/hypothetical-astronomical-objects/messier-102/", "s": "A disputed Messier object with uncertain identity."}, {"n": "Multiverse", "u": "/e/hypothetical-astronomical-objects/multiverse/", "s": "Hypothetical set of all universes, debated in science and philosophy."}, {"n": "Neith (hypothetical moon)", "u": "/e/hypothetical-astronomical-objects/neith-hypothetical-moon/", "s": "Hypothetical moon of Venus, observed but never confirmed."}, {"n": "Nemesis (hypothetical star)", "u": "/e/hypothetical-astronomical-objects/nemesis-hypothetical-star/", "s": "Hypothetical companion star proposed to explain periodic mass extinctions."}, {"n": "Phaeton (hypothetical planet)", "u": "/e/hypothetical-astronomical-objects/phaeton-hypothetical-planet/", "s": "Hypothetical destroyed planet proposed to explain the asteroid belt."}, {"n": "Planet Nine", "u": "/e/hypothetical-astronomical-objects/planet-nine/", "s": "Hypothetical planet proposed to explain distant Solar System orbits."}, {"n": "Planet V", "u": "/e/hypothetical-astronomical-objects/planet-v/", "s": "Hypothetical fifth terrestrial planet proposed to explain the Late Heavy Bombardment."}, {"n": "Planets beyond Neptune", "u": "/e/hypothetical-astronomical-objects/planets-beyond-neptune/", "s": "Hypothetical worlds beyond Neptune, from Planet X to Planet Nine."}, {"n": "Quark-nova", "u": "/e/hypothetical-astronomical-objects/quark-nova/", "s": "Hypothetical explosion from neutron star to quark star conversion."}, {"n": "Rings of Earth", "u": "/e/hypothetical-astronomical-objects/rings-of-earth/", "s": "Hypothetical ring system that may have existed around Earth."}, {"n": "Shell collapsar", "u": "/e/hypothetical-astronomical-objects/shell-collapsar/", "s": "Hypothetical compact object without a central singularity."}, {"n": "Subsatellite", "u": "/e/hypothetical-astronomical-objects/subsatellite/", "s": "A hypothetical natural satellite orbiting a moon."}, {"n": "Synestia", "u": "/e/hypothetical-astronomical-objects/synestia/", "s": "Hypothesized doughnut-shaped mass of vaporized rock from planetary collisions."}, {"n": "Theia (hypothetical planet)", "u": "/e/hypothetical-astronomical-objects/theia-hypothetical-planet/", "s": "Hypothetical planet whose collision with Earth formed the Moon."}, {"n": "Themis (hypothetical moon)", "u": "/e/hypothetical-astronomical-objects/themis-hypothetical-moon/", "s": "Unconfirmed Saturnian moon announced by William H. Pickering in 1905."}, {"n": "Vulcanoid", "u": "/e/hypothetical-astronomical-objects/vulcanoid/", "s": "Hypothetical asteroids inside Mercury's orbit, not yet detected."}, {"n": "Vulcan (hypothetical planet)", "u": "/e/hypothetical-astronomical-objects/vulcan-hypothetical-planet/", "s": "Hypothetical planet once thought to orbit inside Mercury."}, {"n": "Counter-Earth", "u": "/e/hypothetical-astronomical-objects/counter-earth/", "s": "Hypothetical planet orbiting opposite Earth, proposed by Philolaus."}, {"n": "Tyche (hypothetical planet)", "u": "/e/hypothetical-astronomical-objects/tyche-hypothetical-planet/", "s": "Hypothetical gas giant proposed in the Oort cloud."}]