Ferdinand Magellan is the famous explorer known for his arduous voyages across the Pacific Ocean during the Age of Exploration. He is best known for leading the first expedition that successfully circumnavigated the globe, proving that the earth is round and opening new trade routes. His journey, although fraught with challenges, paved the way for further exploration and colonization. Magellan's voyages significantly contributed to European geographic knowledge and maritime navigation, highlighting the importance of exploration in global history.