archaeologicalnews:

An ancient Egyptian papyrus, known as the Cairo Calendar, could be the oldest historical record of a star’s brightness, providing a new perspective on the development of the Algol triple star system over thousands of years.

Known as the Calendar of Lucky and Unlucky Days, the Cairo Calendar, dated from 1244 – 1163 BC, assigns predictions and prognoses to every day of the Egyptian year. These prognoses indicate whether the day, or part of the day, is considered “good” or “bad”. The calendar also contains information regarding the day’s astronomical observations, such as the behaviour of astronomical objects, especially Algol.

Now researchers say that the astronomical symbolism discovered in the two most Ancient Egyptian myths suggest similar clues could be found in other ancient Egyptian texts. Read more.