The galilean moons

The Galilean Moons

The Galilean Moons, as their name suggests were discovered by Galileo Galilee. Their names are Ganymede, Callisto, Io and Europa. These four moons are the biggest moons of Jupiter. These were discovered in January 1610.

Ganymede

Profile:

Diameter: 5,262 km

Size Compared To Mercury: 1.078

Average Distance From Jupiter: 1070400

Info:
 Ganymede is bigger than Mercury the smallest planet in the solar system but it

has half of the weight that mercury has.

Callisto

Profile:

Diameter: 4,821 km

Size Compared To Mercury: 0.98831

Average Distance From Jupiter: 1882700 km

Info:
Callisto the third largest satellite in the solar system is nearly the size of mercury but smaller.

Io

Profile:

Diameter: 3643 km

Size Compared To Mercury: 0.746822

Average Distance From Jupiter: 4,21,800 km

Info:

Io is the third largest moon of Jupiter it was thought to be dead with a frozen core but it was full of volcanic activity. 

Europa

Profile:

Diameter: 3,122 km

Size Compared To Mercury: 0.640016

Average Distance From Jupiter: 6,71,100 km

Info:
Europa is the fourth largest moon of Jupiter and is supposed to have more water than there is on earth.