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planemo

planemo n. an object in outer space with mass insufficient to achieve fusion but large enough to be made roughly spherical by its own gravity. Editorial Note: This term and meaning were derived by way of determining what characteristics, exactly, should constitute a planet. Etymological Note: Coined by Gibor Basri from planetary mass object. (source: Double-Tongued Dictionary)

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Further reading

Your Two Cents (episode #1558)

Astronauts returning from space say they experience what’s called the overview effect, a new understanding of the fragility of our planet and our need to reflect on what humans all share as a species. A book about the end of the universe...