I conclude, therefore, that this star is not some kind of comet or a fiery meteor... but that it is a star shining in the firmament itself one that has never previously been seen before our time, in any age since the beginning of the world.
Now it is quite clear to me that there are no solid spheres in the heavens, and those that have been devised by the authors to save the appearances, exist only in the imagination.
Major developments: He was known for his astronomical observations.
He modeled a very accurate map of the solar system including the positions of 777 stars.
His published material inludes four books:
Astronomiae Instauratae Progymnasmata, Tychonis Brahe Astronomiae instauratae mechanica, Opera Omnia, and Tycho Brahe His Astronomicall Conjectur of the New and Much Admired [symbol for Star] which Appered in the Year 1572