Do "celestial beings" really exist?

I asked this question, simply based on drawings left on different pyramids and tombs by our ancestors, throughout the world. their drawings included “things” that did not look like them. there also appeared to have long runways in their drawings. could this have indicated a landing strip? and, how were the pyramid stones cut within one half-inch clearance from stone to stone? were the ancient Egyptians really this intelligent or did they have help from “celestial beings”?