A few people asked me if there is a reference to aliens in the Written Torah. Yes, there is. It is Genesis 6:1-4
YLT Gn 6:1 And it cometh to pass that mankind have begun to multiply on the face of the ground, and daughters have been born to them,
YLT Gn 6:2 and sons of God see the daughters of men that they are fair, and they take to themselves women of all whom they have chosen.
YLT Gn 6:3 And Jehovah saith, 'My Spirit doth not strive in man--to the age; in their erring they are flesh:' and his days have been an hundred and twenty years.
YLT Gn 6:4 The fallen ones were in the earth in those days, and even afterwards when sons of God come in unto daughters of men, and they have borne to them--they are the heroes, who, from of old, are the men of name.
As you can see from these verses, aliens are referred to as "sons of God" or "sons of Elohim", as well as "ha-nefilim" which literally means "the distinguished ones ". YLT translates it as "fallen ones" as one of the opinions.
As you can see from the verses, they intermarried with human females and produced superior offsprings.
So apparently, we are not alone in the universe after all.