The story
Named in honor of Carl Sagan.
Etymology from Wiktionary, CC BY-SA 4.0.
Sagan's number
Today it means: The total number of stars in the observable universe, often estimated to be in the sextillions. Full definition →
Today it means: The total number of stars in the observable universe, often estimated to be in the sextillions. Full definition →
Named in honor of Carl Sagan.
Etymology from Wiktionary, CC BY-SA 4.0.