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Definition of Sister planet
1. Noun. (astronomy) a planet that shares similar physical characteristics, such as size, density and mass, with another planet ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Sister Planet
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1. Noun. (astronomy) a planet that shares similar physical characteristics, such as size, density and mass, with another planet ¹
¹ Source: wiktionary.com