SOLAR SYSTEM

Detailed explanation-1: -When Galileo pointed his telescope at Jupiter, the largest planet in our solar system, he made a startling discovery. The planet had four “stars” surrounding it. Within days, Galileo figured out that these “stars” were actually moons in orbit of Jupiter.

Detailed explanation-2: -On January 7, 1610 Galileo first viewed Jupiter through his telescope. What caught his eye was not the planet itself, but three bright stars that were arranged in a perfect line on either side of the planet. Galileo sketched Jupiter and the three stars, thinking at first they were simply a chance alignment.

Detailed explanation-3: -The Galilean moons (/ˌɡælɪˈliː. ən/), or Galilean satellites, are the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto.

Detailed explanation-4: -Jupiter’s four largest moons were the first moons discovered beyond Earth. They are called the Galilean satellites after Italian astronomer Galileo Galilei, who first observed them in 1610.