She agreed that he could study during the winter months with the clergyman of the parish; this arrangement continued until 1577, when the ill-will of some of his relatives and his own desire for knowledge caused him to run away to Viborg.

[1] There he attended the grammar school, working as a labourer to pay his expenses, and in 1588 went to Copenhagen with a high reputation for learning and ability.

[4] He visited Frauenburg, where Copernicus had made his observations, took a master's degree at Rostock, and at Copenhagen found a patron in Christian Friis, chancellor of Denmark, who employed him in his household.

Appointed in 1603 rector of the school of Viborg, he was elected two years later to a professorship in the University of Copenhagen, and his promotion to the chair of mathematics ensued in 1607.

King Christian IV of Denmark, to whom he dedicated his Astronomia Danica, an exposition of the Tychonic system of the universe, conferred upon him the canonry of Lunden in Schleswig.

[1] Longomontanus's major contribution to science was to develop Tycho's geoheliocentric model of the universe empirically and publicly to common acceptance.

The observational aspects were complete, but two important tasks remained, namely the selection and integration of the data into accounts of the motions of the planets, and the presentation of the results on the entire program in the form of a systematic treatise.

The book was highly accredited and many famous owners included Christopher Wren, Christiaan Huygens as well as the Royal Greenwich Observatory in England.