A) Rings of Saturn
B) Phases of Venus
C) Moons of Jupiter
D) Surface of Mars
View Answer
C) Moons of Jupiter
Explanation : Galileo discovered the four largest moons of Jupiter, now known as the Galilean moons: Io, Europa, Ganymede, and Callisto.
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(Q) What astronomical discovery did Galileo make using his telescope in 1610 ?
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