How do you appreciate the construction of knowledge about the Universe by our ancestors?

We really appreciate the construction of knowledge about the Universe by our ancestors. Their valuable contributions are:

(i) They researched very hard and defined laws of physics which help us to understand the movement of celestial bodies.

(ii) They invented different devices and instruments like telescope through which we can observe the distant celestial bodies.

(iii) They derived different mathematical formulas to predict the happenings in-universe.

(iv) They built satellites and sent them to different planets for observing the existence of life and other resources.