It's either because Dias found how far south was or because Columbus had explored the area earlier
Vasco didn't even go to Asia, he went to India
He set out to the east of Portugal.
Around Africa and to Asia
No, Vasco de Gama did not go to college. He was too busy trying to figure out a water route to Asia to go to any college. Plus, he did not have that much money.
Batolomeu Diaz, a Portuguese noblemen and the sailing master of the Naval Ship Sao Cristovao was the first European to circumnavigate the Cape of Good Hope in 1488. Before a voyage to Asia was possible they had to know that it was possible to go around Africa. Vasco da Gama then became the first European to complete a sea trip from Europe to Asia (India) 10 years later
he went to the southwest and went around the cape of hope.
He set sail from Lisbon, Portugal (NOT IN SPAIN) on the 8 July 1497.
Vasco da Gama was trying to find a fairly direct trade route from Portugal to India. He was tasked with connecting the already discovered route to southern Africa with the, then, unknown coast of India.
Vasco Rossi goes by Blasco.
He left to find a water route to Asia and to become very rich.
Vasco went to Pacific Ocean