Question

Jupiter has many moons. The four largest moons namely lo, Europe, Ganymede and Callisto were first observed by which of the following astronomer?

• A. Galileo Galileo
• B. E.E. Barnard
• C. P.J. Melotte
• D. C.D. Perrine

Answer 1

The correct option is A Galileo Galileo

• Widely regarded as one of the greatest scientists, Galileo Galilei was an Italian astronomer, physicist, engineer and mathematician, who helped shape the scientific revolution during the Renaissance.
• He discovered Jupiter’s four largest moons viz. Io, Europa, Ganymede, and Callisto. They are together known as the Galilean Satellites in his honour.