The translation of Io, Europa and Ganymede in orbit around Jupiter deserves a separate chapter, as they seem to be intimately and inexplicably linked. Each time Ganymede complete a turn, Europa makes two, and Ío again doubles the rhythm . It is what is known as Laplace Resonance, after the French scientist Pierre Simon Laplace, one of the most significant figures in modern astronomy (he was one of the forerunners of the current theories on the formation of galaxies and solar systems)
As a curiosity, there is evidence, for images sent by the probes Voyager I and II, of volcanic eruptions that hurled plumes ...300 km high! On Earth, plumes of more than 10 or 12 km are already something special and rare. In recent years, images taken by the Hubble Space Telescope and the NASA Infrared Telescope on Mauna Kea, Hawaii, have shown significant differences in the characteristics of the surface of Io, which means that geology, and especially the volcanism of this celestial body are very active, more than in any other body in the solar system.
As a result of this intense volcanic activity, Io's surface is devoid of impact craters like those found on the Moon or other satellite in the solar system. In fact, probably the biggest find of the probes Voyager, which hoped to take pictures of craters to estimate the age of the satellite, was precisely to find an that there where no craters but an enormous number of mountains that proved the volcanoes of Io.
The world of volcanoes is definitely exciting. But did you know that the place with the most active volcanism is in another world? The third largest satellite of Jupiter, Io, slightly larger than the Moon, has about 400 active volcanoes. Most surprising is that the origin of this volcanism is anything but conventional. Io orbits Jupiter closer than the other three large moons, Europa, Ganymede and Callisto - the three being called Galilean in honor of its discoverer. The intense volcanic activity is due to the enormous gravitational pull of Jupiter, and also to the interaction with Europa and Ganymede. This is, in effect, "tidal forces" instead of causing low tides and high tides, resulting in tremendous friction in the inner layers of the satellite, which is heated causing volcanic eruptions.
Apasionado de la ciencia, la fotografía y los viajes. Geólogo de formación y guía de naturaleza por vocación.