SPL RF Mar 2018

Formation of moons around a gas giant. This is how the moons of Jupiter and Saturn, and possibly Uranus, are thought to have formed. The planet is in the centre, still growing. A concentric disc surrounds it, inside of which the natural satellites are forming via the process of accretion. The illustration could also show the formation of planets around a star, which was a similar process albeit on a far larger scale.