Points can include:
- They defined laws of physics that explained and predicted the movement of all celestial bodies
- They invented instruments such as telescopes with the help  of which we are able to observe the distant celestial objects
-basic knowledge of earth being spherical and movement of planets in our solar system was already given to us, to sow the seeds of curiosity 
-Different categories of celestial bodies are already studied and the data is made available to us on internet for further research.  
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