Astronomers observe 450-year-old supernova
A group of astronomers has compiled data from the Chandra X-ray observatory to show that a supernova explosion, first lit up in 1572, continues to grow till date. Called Tycho's supernova, the 450-year-old phenomenon is located 10,000 light-years away from the Earth. It was visible to the naked eye in 1572 and was observed by astronomer Tycho Brahe.