Jupiter is the largest planet in the solar system. It is 300 times significant as compared to Earth. Jupiter has around 79 moons. Four large moons are popularly known as Galilean satellites. Many moons are small, and 60 of its satellites are even less than 6.2 miles in diameter.
Anything passing from Jupiter, such as an asteroid or any other planet, gets entrapped in its orbit. This is because Jupiter has the strongest magnetic field. The planet Earth has only one moon as it lacks the gravitational field.
The satellites of Jupiter consist of orbital periods that range from three to seven Earth years. Certain orbits are circular, while others have irregular orbits. The moons at the outer side have the orbit in the opposite direction of the spinning of Jupiter. It is quite unusual but indicates that Jupiter’s moons were asteroids that get sucked in Jupiter’s orbit.
The astronomer Galileo Galilei discovered four moons of Jupiter in January 1610. The names of these moons are Europa, Lo, Calisto, and Ganymede. The discovery was a crucial point in history as his discovery revealed that all the bodies not only revolve just around the Earth.
Lo is the first moon that is close to Jupiter. This moon has volcanoes. And volcanoes make it the only celestial body apart from Earth having volcanic activity. Lo also has snowfields of Sulfur Dioxide that represent the characterization of ice and fire. Lo’s outer layer is made from brown silicate and iron sulfide core. This gives it a yellow, splotchy orange, white, and clack appearance.
If we move outside, then Europa is the next moon. It is slightly smaller in size as compared to Earth’s moon. However, it is the smallest in size among Galilean satellites. This moon has high reflectivity and is the brightest moon in the solar system.
Ganymede is the 3rd Galilean moon. It is the largest among other moons. The size is similar to that of Mercury, with half of the mass. This moon has its magnetic field. The surface of the moon has covered by ice. Also, sixty percent of the surface is covered by grooved terrain, while 40 percent has covered with dark, cratered regions.
Callisto is the farthest and fourth Galilean moons. The landscape has remained unaltered due to the formation. The moon has the size the same as Mercury but has a low density. It has less impact on the magnetic field as the orbit is farthest from Jupiter.
So, we have discussed the moons of Jupiter. There are many moons of Jupiter, but four Gallinean moons are quite important. Galileo firstly discovers these Galilean moons.