Simplify the following text for a Grade 11 native English-speaking person.
Original: The PasiphaÃ `` group is a group of retrograde irregular satellites of Jupiter that follow similar orbits to PasiphaÃ `` and are thought to have a common origin .
Simplified: The PasiphaÃ `` group is a group of retrograde non-spherical moons of Jupiter that follow similar orbits to PasiphaÃ `` and are thought of have a common origin .