General Knowledge
Who first observed the moons of Jupiter in 1610?
- Galileo Galilei
- Simon Marius
- Johannes Kepler
The answer is Galileo Galilei. Galileo — the four Galilean moons.
Galileo di Vincenzo Bonaiuti de' Galilei, commonly referred to as Galileo Galilei or mononymously as Galileo, was an Italian astronomer, physicist, engineer and polymath. He was born in Pisa, then part of the Duchy of Florence. Galileo has been called the father of observational astronomy, classical physics, the scientific method, and modern science.
Wikipedia · Galileo Galilei