Callisto

American  

[kuh-lis-toh] / kəˈlɪs toʊ /

noun

1. Classical Mythology. Also Kallisto a nymph attendant on Artemis, punished for a love affair with Zeus by being changed into a bear and then transformed into stars as the constellation Ursa Major.

2. Astronomy. a large natural satellite of the planet Jupiter.

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Callisto ¹ British  

/ kəˈlɪstəʊ /

noun

1. Greek myth a nymph who attracted the love of Zeus and was changed into a bear by Hera. Zeus then set her in the sky as the constellation Ursa Major

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Callisto ² British  

/ kəˈlɪstəʊ /

noun

1. the second largest (but faintest) of the four Galilean satellites of Jupiter, discovered in 1610 by Galileo. Approximate diameter: 4800 km; orbital radius: 1 883 000 km See also Galilean satellite

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Callisto Scientific  

/ kə-lĭs′tō /

1. One of the four brightest satellites of Jupiter and the eighth in distance from the planet. Originally sighted by Galileo, it is the largest planetary satellite.

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Example Sentences

Scientists have long theorized that Jupiter's four large moons -- Io, Europa, Ganymede, and Callisto -- originated from a similar disk surrounding the young planet billions of years ago.

From Science Daily • Oct. 29, 2025

Its targets include Callisto, Europa and Ganymede, the largest moon in the solar system.

From Seattle Times • Apr. 28, 2023

Ganymede and Callisto are both relatively inert, ice-rich and much farther from Jupiter than Io and Europa.

From Scientific American • Apr. 24, 2023

It will take the robotic explorer, dubbed Juice, eight years to reach Jupiter, where it will scope out not only the solar system’s biggest planet but also Europa, Callisto and Ganymede.

From Washington Times • Apr. 14, 2023

Voyager approaches Jupiter with the moons Io and Callisto in foreground.

From "Cosmos" by Carl Sagan