(The earliest record of a possible supernova appears in a prehistoric ... one in 1572 (now called Tycho's Nova) and the other in 1604 (now known as Kepler's Star). Then came Galileo's telescope.

Sixteenth century Danish astronomer Tycho Brahe laid the framework for modern cosmology without ever using a telescope.

Discover the explosive end of a star's life—supernovas. Learn what causes these cosmic events and their impact with ...

Some astronomers refer to it as B Cassiopeia. Most, however, call it by its informal name – Tycho’s supernova. While supernovae have been observed for millennia, the one in 1572 remains one of ...