Astronomy Picture of the Day . ... 30.05.1999 . ... Credit: Tycho Brahes Glada Vдnner Explanation: Tycho Brahe was the most meticulous astronomical observer of his time. ... To do this he and his assistants created the first major astronomical observatory where they devised and used the most accurate pre-telescopic astronomical instruments . ... Brahe is also remembered for witnessing a supernova in 1572, showing that the Great Comet of 1577 was not an atmospheric phenomena, and for his metal nose . ...