dwarf planet

noun

Definition of dwarf planet

: a celestial body that orbits the sun and has a spherical shape but is not large enough to disturb other objects from its orbit

Examples of dwarf planet in a Sentence

Recent Examples on the Web The findings made possible by the Dawn mission have scientists eager to explore the dwarf planet and its potential for life in greater detail in the future. Ashley Strickland, CNN, "Dwarf planet Ceres is an ocean world with salty water under the surface, NASA mission finds," 11 Aug. 2020 Dawn spacecraft observed Ceres during its last lap around the dwarf planet in 2017 and 2018. Theresa Machemer, Smithsonian Magazine, "NASA Mission Shows Dwarf Planet Ceres Is Geologically Active," 13 Aug. 2020 But with enough heat from impacts, the dwarf planet may have once been habitable, although it may not have actually been inhabited. Theresa Machemer, Smithsonian Magazine, "NASA Mission Shows Dwarf Planet Ceres Is Geologically Active," 13 Aug. 2020 After arriving at the dwarf planet Ceres in 2015, NASA’s Dawn spacecraft revealed a bizarre world where ice used to flow and erupt like lava. Scott Hershberger, Scientific American, "Claims of ‘Ocean’ inside Ceres May Not Hold Water," 12 Aug. 2020 Frigid cryovolcanoes erupted on the dwarf planet millions of years ago. Michael Greshko, National Geographic, "Dwarf planet closest to Earth is geologically alive," 10 Aug. 2020 The largest object in the asteroid belt, a dwarf planet named Ceres, might contain reservoirs of briny liquid, Michael Greshko reports for National Geographic. Theresa Machemer, Smithsonian Magazine, "NASA Mission Shows Dwarf Planet Ceres Is Geologically Active," 13 Aug. 2020 Tucked into the asteroid belt between Mars and Jupiter, the dwarf planet Ceres is a small world that holds big surprises. Michael Greshko, National Geographic, "Dwarf planet closest to Earth is geologically alive," 10 Aug. 2020 Scientists have long believed that Pluto's ancient subsurface sea slowly formed over millions of years as radioactive decay melted ice on the dwarf planet. Jennifer Leman, Popular Mechanics, "One of the Coldest Objects in the Solar System Might've Had a Violently Hot Start," 23 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dwarf planet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of dwarf planet

1993, in the meaning defined above

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Time Traveler for dwarf planet

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The first known use of dwarf planet was in 1993

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Last Updated

5 Oct 2020

Cite this Entry

“Dwarf planet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dwarf%20planet. Accessed 20 Oct. 2020.

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More Definitions for dwarf planet

dwarf planet

noun

Kids Definition of dwarf planet

: a heavenly body similar to a planet but too small to clear other objects from its orbit

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