When the great Danish astronomer Tycho Brahe gazed into the heavens on November 11, 1572, he witnessed one of the defining events in the history of his science. In the constellation of Cassiopeia, he clearly made out what appeared to be an entirely new star, brighter even than Venus, that had not been there before. Though he did not know it, he was among the first people to see a supernova a violent explosion in which certain stars end their lives.
You may recall Isaac Newton's famous quote: If I have seen further than others, it is by standing upon the shoulders of giants. One of those giants was the flamboyant silver-nosed Danish astronomer Tycho Brahe. His accurate pre-telescopic observations laid the groundwork for modern astronomy. He threw darned good parties too.