Who invented the week?

Around 700 BC, Babylonians who were keen on astronomy found seven stars in the sky, so they built a seven-star altar to worship them. The seven-star altar is divided into seven layers, and each layer has a star god. There are seven immortals from top to bottom: sun, moon, fire, water, wood, gold and earth. Coincidentally, the length of the new moon is about 29.5 days, and the date of not seeing the moon is about one and a half days, and the moon can be seen in the remaining 28 days. It takes about 7 days from the full moon to the half moon; About 7 days from half a month to the end of the month; Or vice versa, astronomers from Dallas to Babylon in the auditorium were overjoyed. They thought they had discovered the greatest mysterious number in the universe, that is, "7". Since then, a month has been divided into four weeks, seven days a week. Seven star gods are in charge of one day a week, offering sacrifices to one god every day. Each god is named after a god: Chamakh, the sun god, is in charge of Sunday, which is called sunny day; The moon god Xin is in charge of Monday, called the moon day; Niga, the god of Mars, is in charge of Tuesday, which is called the bright day of fire; Naboo, the god of mercury, is in charge of Wednesday, which is called Water Rong Yaori. Duke, the god horse of Jupiter, is in charge of Thursday, called Mu Yaori; Istar, the god of Venus, is in charge of Friday, called Jin Yaori; Saturn's god Ninuda rules Saturday, which is called the Rong Yaori of the Earth.