Brahe

Tycho
[tee-koh;; Danish ty-koh] /ˈti koʊ;; Danish ˈtü koʊ/ (Show IPA), 1546–1601, Danish astronomer.
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The Nuttall Encyclopaedia Edited by Rev. James Wood

noun
Tycho (ˈtyːço). 1546–1601, Danish astronomer, who designed and constructed instruments that he used to plot accurately the positions of the planets, sun, moon, and stars
Brahe
(brä, brä’hē)
Danish astronomer who made the most accurate and extensive observations of the planets and stars before the telescope was invented. Brahe determined the position of 777 stars, demonstrated that comets follow regular paths, and observed the supernova of 1572, which became known as Tycho’s star. Although Brahe did not accept the Copernican heliocentric model of the solar system, his careful observations allowed Johannes Kepler to prove that Copernicus was essentially correct.