The stars speak
They really spelled it out for us. The gods and the planets — it is all there if you just look. The entire theory of the zodiac... It is all right there in the sky. Hell, you don't even have to plot the precession and take painstaking measurements — that's not the point.
All you need to do is direct your attention skyward on a clear night. Focus on the point of light and still your mind. That's what our ancestors figured out how to do that we forgot.
Just listen to the night sky. It has a voice. Thoughts will appear in your mind.
Now of course, most focus on the big shiny ones. Jupiter. Venus. Mars. Each pin prick of light is an intelligent source, willing to converse. Not necessarily our ancestors, but they might be relatives.
Here's where it gets weird... Even the space between the stars will respond when questioned. Be careful where you focus. There's some places in the sky where you shouldn't look.