In July 1054, court astronomers in China recorded a new "guest star" near Tianguan, the star we now call Zeta Tauri. It was bright enough to be seen in
In July 1054, court astronomers in China recorded a new “guest star” near Tianguan, the star we now call Zeta Tauri. It was bright enough to be seen in daylight. For nearly a month it remained visibl… [+6230 chars]