Once some major observations were made by the Brahes, Tycho requested money from King Frederick II of Denmark, Frederick the Great, to move forward with more observation facilities in Hveen. The king was under the impression that the observatories were for Tycho and his personal research; however it is known that some of the observatories were made for Sophia to work in for her own observations. Much of the data that was gathered throughout Tycho's life was passed down to his pupil, Johannes Kepler, rather than his sister, Sophia Brahe. It can be said that the work that Sophia Brahe assisted her brother in laid the groundwork for Sir Isaac Newton.