Educating Jupiter Jupiter went to school in Newtown, NSW and afterwards attended Lyndhurst College, Sydney, where he was baptised as Roman Catholic and christened John Joseph. There he did well at sports such as cricket, football and running. At cricket, he was a medium-fast bowler, a good fielder, and a sound batsman. He could run 100 yards in 11 seconds. Hugh Mosman was a keen horseman who enjoyed competing in steeplechase races. He taught Jupiter how to ride and about horse racing more generally. They rarely opened a gate, preferring to jump their horses over it.