Multiple choice general knowledge

Galileo was an Italian astronomer who

  1. developed the telescope

  2. discovered four satellites of Jupiter

  3. discovered that the movement of pendulum produces a regular time measurement

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Galileo Galilei (1564-1642) made significant improvements to the telescope in 1609, discovered Jupiter's four largest moons (Io, Europa, Ganymede, Callisto), and studied pendulum motion which led to more accurate timekeeping. While he didn't invent the telescope (Hans Lippershey did), his astronomical discoveries and systematic observations were revolutionary. His work on pendulums later influenced Christian Huygens' pendulum clock.

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