1 In the beginning God created the heavens and the earth.
2 Now the earth was formless and empty, darkness covered the surface of the watery depths, and the Spirit of God was hovering over the surface of the waters.
The heavens here means the universe and then God focuses on the earth and on humanity but no extraterrestrial (Aliens from another planet) are mentioned. The man is created in God’s image, showing that He wants to put Himself ( His character) in man, for the purpose to dwell with humanity in the future forever but once again extraterrestrials are not mentioned and according to those who witnessed Aliens through abduction, they said that they looked like reptilian.
14 Then God said, “Let there be lights in the expanse of the sky to separate the day from the night. They will serve as signs for festivals and for days and years. 15 They will be lights in the expanse of the sky to provide light on the earth.” And it was so. 16 God made the two great lights—the greater light to have dominion over the day and the lesser light to have dominion over the night—as well as the stars. 17 God placed them in the expanse of the sky to provide light on the earth, 18 to dominate the day and the night, and to separate light from darkness. And God saw that it was good.
The purpose for the sun, moon, and stars, is to give us light for day and to have some light at night. It was also for telling us when to celebrate God’s festivals and to navigate through the vast ocean by the stars. The planets were not created for other lifeforms but for humanity as seen in Deuteronomy 4:19 which says, 19 When you look to the heavens and see the sun, moon, and stars—all the array of heaven—do not be led astray to bow down and worship them. The Lord your God has provided them for all people everywhere under heaven. God made the universe for men.
1 The heavens declare the glory of God,
and the sky proclaims the work of His hands.
2 Day after day they pour out speech;
night after night they communicate knowledge.
3 There is no speech; there are no words;
their voice is not heard.
4 Their message has gone out to all the earth,
and their words to the ends of the world.
In the heavens He has pitched a tent for the sun.
The universe was also created so that humanity can know that God exists by showing us His handiwork. Just like when you see a painting you know that there was a painter. In other words, the universe is like God’s footprints in the sand.
19 For the creation eagerly waits with anticipation for God’s sons to be revealed. 20 For the creation was subjected to futility—not willingly, but because of Him who subjected it—in the hope 21 that the creation itself will also be set free from the bondage of corruption into the glorious freedom of God’s children.
Creation (the universe) was cursed because of Adams disobedience and it is waiting for its transformation when God will dwell with men and create a new heaven and earth (Isaiah 65:17, Revelation 21:1). God cursed His creation because it was for men so when Adam sinned, it affected the heavens and the earth. If Aliens existed then they would have been cursed alongside creation for something they didn’t do if they did really exist.
2 Peter 3:5-7, 10-13
5 They willfully ignore this: Long ago the heavens and the earth were brought about from water and through water by the word of God. 6 Through these waters the world of that time perished when it was flooded. 7 But by the same word, the present heavens and earth are stored up for fire, being kept until the day of judgment and destruction of ungodly men.
10 But the Day of the Lord will come like a thief; on that day the heavens will pass away with a loud noise, the elements will burn and be dissolved, and the earth and the works on it will be disclosed. 11 Since all these things are to be destroyed in this way, it is clear what sort of people you should be in holy conduct and godliness 12 as you wait for and earnestly desire the coming of the day of God. The heavens will be on fire and be dissolved because of it, and the elements will melt with the heat. 13 But based on His promise, we wait for the new heavens and a new earth, where righteousness will dwell.
According to the verses above, the whole universe will be destroyed and if extraterrestrials exist then they too will perish and exist no longer because the new heavens and earth will be created for humanity only. It is very clear that Aliens do not exist because all through the Bible, the universe is for light, signs, and for proclaiming God’s existence. There’s not even a hint of God making different lifeforms other than angels, humans, and animals of all kinds.
The question then arises, what are Aliens? Demons manifest themselves as Aliens to deceive men in believing that God didn’t create the universe, that there is something more out there and we are not alone. Demons want to take our focus away from God and place it on another creature which would bring doubt on God’s Word. The Aliens are demons.