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Mass resonance between Jupiter's four large moons Io, Europa, Ganymede and Callisto
"In 1610 when Galileo first pointed a telescope at the sky he
discovered Jupiter's four large moons Io, Europa, Ganymede and Callisto (now known as the Galilean moons)" Mass_Io=8.93e22 Mass_Europa=4.80e22 Mass_Ganymede=1.48e23 Mass_Callisto=1.08e23 http://www.nineplanets.org/data1.html Mass_Europa+Mass_Ganymede=1.9600e+023 Mass_Io+Mass_Callisto = 1.9730e+023 (Mass_Io+Mass_Callisto)/(Mass_Europa+Mass_Ganymede) = 1.0066 "Io, Europa and Ganymede are locked together in a 1:2:4 orbital resonance (Laplace resonance) and their orbits evolve together. Callisto is almost part of this as well. In a few hundred million years, Callisto will be locked in too, orbiting at exactly twice the period of Ganymede (eight times the period of Io). " http://www.nineplanets.org/jupiter.html ( Io + Callisto ) and ( Europa + Ganymede ) are locked together in a 1:1 Mass resonance named after Aleksandr Timofeev ================================================== ======= ( Mass_Io + Mass_Callisto ) / ( Mass_Europa + Mass_Ganymede ) = 1.0066 ================================================== ======= Mass_Io - mass of Io Mass_Callisto - mass of Callisto Mass_Europa - mass of Europa Mass_Ganymede - mass of Ganymede |
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