First image: Jupiter and Europa.
Second image: Jupiter seen from Cassini–Huygens perspective.
I kept the proportions of size and distance.
The blue parts are simply auroras.
The probe model: https://science.nasa.gov/3d-resources/
Space texture: https://svs.gsfc.nasa.gov/4856
Jupiter texture: https://planetpixelemporium.com/planets.html
Europa texture: https://pixabay.com/photos/map-europa-moon-ice-cold-4818874/