<Li> 1427--Diogo de Silves discovered the Azores, which was colonized in 1431 by Gonçalo Velho Cabral . </Li> <Li> 1434--Gil Eanes sailed round Cape Bojador, thus destroying the legends of the' Dark Sea' . </Li> <Li> 1434--the 32 point compass - card replaces the 12 points used until then . </Li> <Li> 1435--Gil Eanes and Afonso Gonçalves Baldaia discovered Garnet Bay (Angra dos Ruivos) and the latter reached the Gold River (Rio de Ouro). </Li>

Who set up a center for astronomical and geographical studies in portugal