The Ancient Egyptians cared a great deal about astronomy. Probably too much, in fact. According to their beliefs, the movements of the planets and stars played a role in the annual flooding of the Nile river, and if you are an Ancient Egyptian, you will do just about anything to appease the Nile, and that includes laboriously tabulating star positions for millennia.
Beyond simply recording positions, the Ancient Egyptians also devised methods to be able to predict the behaviour of astronomical objects in the future, and even to use stars to tell the time of day. One of these time-keeping methods functioned through the use of a “star clock”. To use a star clock, one needed two people. One person to sit facing North, and another to sit facing them. As the night passed the recorder would mark when certain stars passed behind the body of the other. The information gathered from this could then be used to find an entry in a table which gave the correct time.
Astronomy even came to have a religious significance. The tombs of various pharaohs feature many artifacts and murals depicting the movements of the stars and charts representing their positions. It is theorized that knowledge of these stars would benefit the pharaohs in navigating the realm of the afterlife.