On this day in 1562, the now obscure but significant astronomer Christian Sorensen Lomborg, better known by his Latinized name Longomontanus, was born in the village of Lomborg in Jutland, Denmark. He was the son of a menial laborer who died when he was eight. But Longomontanus transcended his humble background, working at gritty jobs to put himself though school, where he showed a talent for the sciences. He eventually became the assistant of the more famous astronomer Tycho Brahe, whose observatory in Uraniburg was renowned as the finest and most advanced in Europe. As John Robert Christenson recounts in his book On Tycho’s Island: Tycho Brahe and his assistants, 1570-1601, the 26 year old Longomontanus was a bit long in the tooth to be an intern, but he was extremely bright conscientious and congenial, and his famous master took such a liking to him that Longomontanus became his personal secretary and even tutored his children.