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Definition of Standard ruler
1. Noun. (astronomy) Any astronomical object of known diameter whose distance can then be calculated from the angle it subtends ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Standard Ruler
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1. Noun. (astronomy) Any astronomical object of known diameter whose distance can then be calculated from the angle it subtends ¹
¹ Source: wiktionary.com