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• / magellan-and-the-first-circumnavigation-of...

• https://www.amazon.com/How-Find-Earth...

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• https://books.google.com.eg/books/abo...

• https://muslimheritage.com/the-book-o...

• https://www-istp.gsfc.nasa.gov/starga...

• / 691701.how_did_we_find_out_the_earth_is_ro...

Images Attributions:

• researchgate . net (Trundholm sun chariot)

• Wikimedia Commons (The Hindu Earth/ Anaximander/ Aristotle / Eratosthenes/ Al-Biruni/ Ptolemy/ Astrolabe/Vasco Da Gama/ Shehab Eldin Ahmad ibn Mājid/ Christopher Columbus/ Ferdinand Magellan/spacecraft/Astronaut on moon/ Carl Sagan)

• ESA/Hubble & NASA 2017 (Northern Star)

• Media.sciencephoto. com (Christopher Columbus with King Ferdinand and Queen Isabella)

• Nasa (earth from moon)