The night, the river, and the price of barley

A scribe in Babylon writes what the sky did, what the weather did, how high the river stood, and what barley cost. The same tablet. Night after night, year after year, from the seventh century BCE into the first. Planets are tracked against stars. A lunar eclipse is a date. A market is a date. The sky is not a separate subject.

They are not discovering what a star is made of. They are keeping a city in time. The labor is repetition. That is the method.

They could know that the same lights return in the same order. They could predict some eclipses from long practice. They could not know distances in light-years. They did not need to. A diary is not a theory of the Galaxy.