Cosmic Mystery: A star that no longer exists revealed in a 2,400-year-old night sky map

Researchers in Italy have recently found detailed maps of the night sky dating back to more than 2,400 years ago. 

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According to a study published in the journal Astronomical Notes on November 22, researchers excavated a map carved into a circular white stone at an ancient fort in northeastern Italy. 

The map is about the size of a car tire and…