What are the Galilean months?

The Galilean months are Jupiter's biggest four months, discovered in 1610 by the Italian astronomer and physicist using one of the first telescopes. The discovery of the Galilean months and the consequences of the universe they mean are considered a landmark in the Renaissance. By discovering the first months orbiting another planet Galileo, he showed that other planets have their own gravity and support the theory of Copernican heliocentrist, which was published 67 years ago. Ganymede has a diameter of 5262 km, Callisto is 4820 km, IO is 3660 km and Europe is 3121 km. The distance from Jupiter is IO, Europa, Ganymede and Callisto. Ganymede is even bigger than Mercury, although its mass is only about half. Callisto approaches Mercury size. By comparison, our own month is 3474 km, so it is larger than Europa.

together with the Moon, Saturn's Titan and Neptune Triton consists of Galilean satellites of the seven largest satellites in the solar system, sometimes called "Big Seven". Are larger than everythingChny other satellites in the solar system with significant margin. Looking at the variant between these satellites is a good way to learn about different planetary geographies and history.

To describe the Galilean months in terms of appearance: Io, closest to Jupiter, looks like a yellow pizza because it is covered with exploding volcanoes and frosts of sulfur dioxide. Ganymede: The largest that looks like a giant shaded sandstone, including huge ice sectors broken asteroids. Callisto: A very dark moon with clear white spots, colored so many craters that no new one can create without erase one of the more ancient. And Europa: The smallest, mostly white sphere with brown linea criss-crossing its surface and some large brown smudges.

The Galilean months are one of the most impressive celestial monuments that can be observed using a top telescope. Although huge, one of these months could bI have to swallow in a large red spots of Jupiter.