Simplify the following text for a Grade 6 native English-speaking person.
Original: Magellan 's expedition of 1519 â `` 1522 became the first expedition to sail from the Atlantic Ocean into the Pacific Ocean ( then named `` peaceful sea '' by Magellan ; the passage being made via the Strait of Magellan ) , and the first to cross the Pacific .
Simplified: He was also the first to sail through the Strait of Magellan , so it was named for him .