There is neither Jew nor Greek, there is neither slave nor free person, there is not male and female; for you are all one in Christ Jesus. (Galatians 3:28). Holy Father confects an argumentum ad absurdum to deal with the question of Martians:
If – for example – tomorrow an expedition of Martians came, and some of them came to us, here… Martians, right? Green, with that long nose and big ears, just like children paint them… And one says, ‘But I want to be baptized!’ What would happen? ….. [Later quoting Acts 11:17] ….. If then God gave them the same gift He gave to us when we came to believe in the Lord Jesus Christ, who was I to be able to hinder God?”
God is God of the Universe. Read the Vatican Radio story here.