What is the orbital ratio relationship among Io, Europa, and Ganymede, known as Laplace resonance?

Answer

4:2:1

The Laplace resonance dictates that for every single orbit completed by Ganymede (Jupiter III), Europa (Jupiter II) completes two orbits, and Io (Jupiter I) completes four orbits, establishing a precise 4:2:1 timing sequence.

What is the orbital ratio relationship among Io, Europa, and Ganymede, known as Laplace resonance?
astronomyJupitersolar systemformationGalilean moonsmoonsmoon formation