Interiors of Ganymede and Europa
![](https://cdn.sci.esa.int/documents/34530/35480/1567217389150-EJSM_Image2_screen.jpg)
Date: 31 January 2011
Copyright: ESA/NASA
- completely frozen;
- three-layered structures impeding any contact between the liquid layer and the silicate floor;
- thick upper icy layer (>10 km) and a deep ocean;
- very thin upper icy layer (3-4 km).
Last Update: 1 September 2019