Webografie

https://www.britannica.com/biography/Galileo-Galilei

https://en.wikipedia.org/wiki/Isaac_Newton

https://en.wikipedia.org/wiki/Nicolaus_Copernicus

https://interestingengineering.com/science/9-of-the-worlds-most-influential-early-astronomers

https://www.space.com/16095-famous-astronomers.html

https://skiesandscopes.com/famous-astronomers/

https://hmn.wiki/ro/Interstellar_travel

https://www.britannica.com/place/Virgo-A

https://ro.wikipedia.org/wiki/Catalogul_Messier

http://astromaphilli14.blogspot.com/p/m.html

https://www.newwayairbearings.com/news/blog/6744/astronomy-observatory/