The Book of Enoch comes up now and then in Bible prophecy. So you might want to be aware of the arguments presented in and about this book. You have to be very careful here because some people will use the Book of Enoch for actually proving that aliens exist.
Alien Resistance and other Christian websites like them say that these beings will be nothing more than fallen angels setting the world up for great deception.
The theory by those who run the Alien Resistance website is that there will be a great deception in the last days carried out by fallen angels who will pass themselves off to the world as aliens from another world or dimension. They say these fallen Angels also produced the Nephilim that we are told about in Genesis in pre-flood days.
Ill let you decide what is true. Even today, if you talk about angels producing offspring with women the majority of Christians will look at you like you have two heads because they see conflict in one misunderstood verse (Mt 22:30). Never mind that a literal reading of Genesis makes what happened quite clear. The popular Sons of Seth Theory that almost everyone in Christianity teaches is probably just plan wrong.
One thing for certain, is that you will not hear about these things in mainstream Christianity. So if there is truth here, Satan did a pretty good job of covering it up leaving almost everyone on earth wide open for a staged alien great deception.
I believe the fallen angels did create the Nephilim on the earth. It is not just the Book of Enoch that tells us that angels came to earth and had offspring with women. Josephus and other ancient writings also tell us that happened. Even so, I do not know how much truth is in the manuscripts of the Book of Enoch about pre-flood events. This whole subject is great food for thought, but it can be a great diversion and even lead into deception if you are not careful and grounded in the scriptures .
For more information on this topic you might explore the Alien Resistance website. It is a Christian site that primary deals with the fallen angels and the UFO connection
Here is a link to the Book of Enoch.
Don Koenig founded www.thepropheticyears.com website in 1999 after almost thirty years of independent study on the Bible and learning from many astute teachers within Christendom. Don created his website to write about Bible prophecy, biblical discernment and his Christian worldviews. Don wrote a free Revelation commentary ebook in 2004 named "The Revelation of Jesus Christ Through The Ages". The World and Church and Bible Prophecy section of this website was started in 2007.