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Scott Rasmussen's Number of the Day for July 17, 2023

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By Scott Rasmussen

The Number of the Day columns published on Ballotpedia reflect the views of the author.

July 17, 2023: Five years ago today, 12 new irregular moons were discovered orbiting Jupiter. Scott Sheppard, the man who discovered these moons, is responsible for the discovery of a total of 82 of Jupiter's 95 moons as of 2023, the three most recent of which were announced in February of this year.[1]

The first 4 moons were discovered by Galileo Galilei in 1610. These 4 moons contain 99.997% of all matter in constant orbit around Jupiter, with the 91 other moons and Jupiter’s subtle rings accounting for the remaining 0.003%. Ganymede, the largest of Jupiter’s moons, is larger than Mercury, and thus the 8th largest object to orbit our sun.[1]


Note: Neither Scott Rasmussen, ScottRasmussen.com, nor RMG Research, Inc. have any affiliation with Rasmussen Reports. While Scott Rasmussen founded that firm, he left nearly a decade ago and has had no involvement since that time.



Each weekday, Scott Rasmussen’s Number of the Day explores interesting and newsworthy topics at the intersection of culture, politics, and technology.

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