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first determined
the world’s circumference -
Recognized the oceans importants to trade and commerce and estblished a center of learning fro the marine scinces.
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circumnavigated
the globe through a passage
way at 52° S latitude now
called the Straights of
Magellan. -
it helped trade and shipping from america to europe
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He discovered hawaiians
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He published the Wind and Current Chart of the North Atlantic, which showed sailors how to use the ocean's currents and winds to their advantage and drastically reduced the length of ocean voyages
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gather data on a wide range of ocean features, including ocean temperatures seawater chemistry, currents, marine life, and the geology of the seafloor
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He measured the angle between the horizon and the
North Star (Polaris is located directly above the
North Pole). It helped us navigate
