Sagan's number

proper noun

The total number of stars in the observable universe, often estimated to be in the sextillions.

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Meanings

proper noun
  1. astronomyThe total number of stars in the observable universe, often estimated to be in the sextillions.

Origin

Named in honor of Carl Sagan.

Full word history & related roots →
Cite this entry
APA

Sagan's number. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Sagan's%20number

MLA

“Sagan's number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Sagan's%20number. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Sagan's number,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Sagan's%20number.

Source: Sagan's number on Wiktionary, CC BY-SA 4.0.