Jupiter’s moons could keep each other warm by raising tidal waves
Gravitational kneading from the mammoth planet is not the satellites’ only source of heat
![Photos of the four largest moons of Jupiter](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/07/072720_LG_jupiter-tidal_feat.jpg?fit=1028%2C579&ssl=1)
Gravitational forces from Jupiter’s four largest moons (from left: Io, Europa, Ganymede and Callisto) push and pull on each other’s insides, helping to keep the interiors sloshy, a study suggests.
JPL-Caltech/NASA, DLR