Definitions from Wiktionary (standard ruler)
▸ noun: (astronomy) Any astronomical object of known diameter whose distance can then be calculated from the angle it subtends
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▸ noun: (astronomy) Any astronomical object of known diameter whose distance can then be calculated from the angle it subtends
Similar:
architect's ruler,
standard candle,
ruler,
parallel ruler,
alidade,
semidiameter,
reference star,
standard star,
cosmolabe,
astronomical unit,
more...
Opposite:
▸ Words similar to standard ruler
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▸ Wikipedia articles (New!)
▸ Words that often appear near standard ruler
▸ Rhymes of standard ruler
▸ Invented words related to standard ruler