宇う宙ちゅうの距きょ離り梯子はしご

noun, expression

cosmic distance ladder; cosmological distance ladder

Technical astronomy term for the succession of methods used to determine distances to celestial objects.

• 宇う宙ちゅうの距きょ離り梯子はしごは、近ちかくの星ほしから遠えん方ぽうの銀ぎん河がまでの距きょ離りを測はかる手しゅ法ほうの連れん鎖さです。

  The cosmic distance ladder is a chain of methods for measuring distances from nearby stars to distant galaxies.