A dwarf planet is a small planetary-mass object that is in direct orbit of the Sun, smaller than any of the eight classical planets but still a world in its own right. The prototypical dwarf planet is Pluto. The interest of dwarf planets to planetary geologists is that they may be geologically active bodies, an expectation that was borne out in 2015 by the Dawn mission to Ceres and the New Horizons mission to Pluto.
Astronomers are in general agreement that at least the nine largest candidates are dwarf planets: Pluto, Eris, Haumea, Makemake, Gonggong, Quaoar, Sedna, Ceres, and Orcus. Of these nine plus the tenth-largest candidate Salacia, two have been visited by spacecraft (Pluto and Ceres) and seven others have at least one known moon (Eris, Haumea, Makemake, Gonggong, Quaoar, Orcus, and Salacia), which allows their masses and thus an estimate of their densities to be determined. Mass and density in turn can be fit into geophysical models in an attempt to determine the nature of these worlds. Only one, Sedna, has neither been visited nor has any known moons, making an accurate estimate of mass difficult. Some astronomers include many smaller bodies as well, but there is no consensus that these are likely to be dwarf planets.
🪐Planet Size Comparison V2:Zoom Out And Cinematic🌘
20000 Varuna / Minor Planet / 688 km
1 Ceres / Dwarf Planet / 946 km
90482 Orcus / Trans-Neptunian Minor Planet / 958.4 km
90377 Sedna / Dwarf Planet / 995 km
50000 Quaoar / Dwarf Plant / 1,110 km
136472 Makemake / Dwarf Planet / 1,430 km
136108 Haumea / Dwarf Planet / 1,632 km
136199 Eris / Dwarf Planet / 2,326 km
134340 Pluto / Dwarf Planet / 2,376.6 km
Moon / Earth's Moon / 3,474.8 km
Kepler 37b / ExoPlanet / 4,510.7 km
Mercury / Terrestrial Planet / 4,879.4 km
Mars / Terrestrial Planet / 6,779 km
Venus / Terrestrial Planet / 12,104 km
Earth / Terrestrial Planet / 12,742 km
Proxima Centauri B / Rocky ExoPlanet / 14,000 km
Kepler 186 F / ExoPlanet / 14,908 km
Kepler 10b / Terrestrial Planet / 18,731 km
CoRoT 7b / ExoPlanet / 20,018 km
55 Cancri E / Super Hot Rocky / 23,891 km
Gliese 581 D / ExtraSolar Planet / 28,032 km
Kepler 10 C / Largest Rocky / 29,944 km
Planet 9 / Outer Planet / 39,000 km
Neptune / Outer Planet / 49,244 km
Uranus / Outer Planet / 50,724 km
Kepler 16b / ExoPlanet / 107,780 km
Saturn / Outer Planet / 116,460 km
Jupiter / Outer Planet / 139,820 km
Kepler 39b / ExoPlanet / 174,440 km
HD 209458 B / ExoPlanet / 193,030 km
WASP-12 B / Hot Jupiter / 255,940 km
TrES-4 B / Largest ExoPlanet / 257,230 km
51 Pegasi B / Gas Giant ExoPlanet / 271,670 km
HAT-P-32 B / ExoPlanet / 291,260 km
Gliese 876 D / Neptune-Like ExoPlanet / 500,900 km
ROXs 42B B / 3rd Largest ExoPlanet / 626,220 km
GQ Lupi B / 2nd Largest ExoPlanet / 930,000 km
HD 100546 B / Gas Giant / 986,590 km
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0:00 Planet Size Comparison Zoom Out
1:59 Planet Size Comparison Cinematic
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