There are a lot of terms used: Second coming, eschatology, end times, and rapture among a few. There is so much disagreement that over time it will require many different posts. For instance the rapture. You have pre-trib, post-trib and mid-trib. Does Jesus reclaim His church before, during or after the great tribulation. The answer can split a church. I am what I heard called a pan-trib person. I believe it will all pan out in the end and it isn’t worth getting worried about.
Most Christian teaching about the end of the world is found in the Apocalyptic literature. These include Revelation, Daniel and Ezekiel. It is a genre that has its own rules which seem to be subject to change depending on what you want to prove. It is full of visions and strange events that would fit well in modern horror and fantasy novels.
Some teaching is found in the gospels but the most important passage is often ignored.
(Mark 13:32 KJV) But of that day and that hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father.If people paid attention to this verse they would spend less time writing books, studying Revelation and looking like fools in the secular media.
Christians all believe that Jesus is coming back. Beyond that we have as many variations as there are types of pizza.
homo unius libri