Changes

[[16th century|1572]] – A [[supernova]] was observed in the Cassiopeia constellation in the Northern Sky. For two weeks, it was brighter than any other star in the sky, as well as visible during the day. <br> By month's end, it began to fade and change color: from bright white, to yellow and orange, to faint reddish light. It was visible to the naked eye for about 16 months, until Mar 1574. <br>