Because in the 1600's the optical power and resolution was not good enough to detect any of the other moons.
It was 282 years before the next moon was discovered.
He saw 4 moons
Galileo looked at the planet Jupiter and observed its 4 largest moons (which are still known as the Galilean moons, to this day).
He could only make out four of Jupiters' largest moons.
My answer is four moons that Galileo found on or near Jupiter.
Galileo discovered the four largest moons of Jupiter and that Venus showed phases like those of the moon.
He saw 4 moons
Galileo looked at the planet Jupiter and observed its 4 largest moons (which are still known as the Galilean moons, to this day).
He could only make out four of Jupiters' largest moons.
Yes he did! Galileo was the first one to discover Jupiter's 4 moons.
That was Galileo.
My answer is four moons that Galileo found on or near Jupiter.
Galileo discovered them. Their names are: Io, Callista, Europa and Ganymede. He discovered them in January 1610. == ==Galileo Galilei in 1610.
Yes. That is why they are called the Galilean Moons
Galileo did NOT discover Jupiter; just Jupiter's 4 largest moons.
Jupiter's largest four moons, called the Galilean satellites because Galileo was the first person to see them, are Europa, Io, Callisto and Ganymede.
Galileo
Galileo was the first to observe the 4 largest moons of Jupiter (which are still known as the Galilean moons, in his honor).