Multiple choice general knowledge science & technology

Galileo discovered..?

  1. Ganymede

  2. Titan

  3. Pluto

  4. Moon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Galileo discovered Ganymede in 1610 using his telescope, making it the first moon discovered orbiting a planet other than Earth. Titan orbits Saturn, Pluto is a dwarf planet, and Earth's moon was known since ancient times.

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