Kasterborus
Kasterborus was an astrologer in the fourth millennium, who was credited with shaping neo-astrology.
He was the first to study the constellations from Earth's position, remapping them to the arrangement of the stars from other human colonies. Some belived this was to appease pressure groups.
Legacy
In an all-too-rare sense of humour, the inhabitants of Gallifrey named one of their constellations after him.
While many of his calculations were destroyed in the fire that destroyed Cyrrhenis Minima's capitol, it was later observed that the surviving calculations showed how much respectful his calculations were to fundamental aspects of astrology. (PROSE: Introduction and links)