Asteras is a Greek word meaning star. See also:

Ethnikos Asteras F.C. Asteras Tripolis F.C. Agrotikos Asteras F.C. Kyanos Asteras Vari F.C. Asteras Amaliada F.C. Nafpaktiakos Asteras F.C. Asteras Magoula F.C. Neos Asteras Rethymno F.C. Asteras Exarchia