Multiple choice

What were some of the first astronomical objects that Galileo discovered?

  1. Saturn

  2. Earth's Moon's Moons

  3. Jupiter's Moons

  4. 'Merica
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C Correct answer
Explanation

In 1610, Galileo Galilei used his telescope to discover the four largest moons of Jupiter, now known as the Galilean moons (Io, Europa, Ganymede, and Callisto). This discovery provided critical evidence for the Copernican heliocentric model of the solar system.

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