Ah I understand now.
I believe that both optics and the laws of mechanics played a major role in understanding cosmic phenomena. In 1609, data on celestial bodies began to be recorded with the telescope invented by Galileo Galileo. Isaac Newton also wrote a book in 1687 that described and explained his gravitational laws, which were intended to explain cosmic phenomena.
So I agree with you Sir: we need optics to observe them first.
Thank you Sir, my best regards to you.
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