Submitted by György Chityil ... on Fri, 01/19/2018 - 18:05 Hierarchy: NounDescription: {{astronomy}} The unit of mass equal to that of the Earth. 1 M<sub>?</sub> = 5.9742 × 10<sup>24</sup> kg.Ngram: Earth massNgram Text: Earth massSource: WiktionaryIssue: 0Wiktionary tag: astronomyNgram Count: 2