Because it's the mother ship Gary. ;)
Covered in a few My of dust...
My list:
Earth
Callisto
Tethys
Oberon
Titan
Enceladus
Rhea
Rosalind
Europa
Sinope
Triton
Rhea again, it's rheally cool!
Iapetus
Ariel
Larissa
Now that's a solarsystem....
