There may be life on other planets.  There is nothing in our understanding of Jesus Christ of christianity that conflicts with the possibility of other life in the universe.  In fact, angels and demons pre-existed life on this planet.  We serve an enormous God who has existed from before this universe.  The possiblity of more life in no way conflicts with the salvation that is offered in Jesus.     A careful study of Scripture, in many places, shows that the salvation God is offering is universal.  The bible speakes of Jesus reconciling "all things" to himself.    One of my favorite Scriptures comes out of Hebrews 1;10-12: "You, Lord, in the beginning did create the Earth and the HEAVENS are the work of your hands.  They shall perish, but you continue.  They shall become old like a garment.  Like a mantle you will roll them up and they will be changed.  But you are the same and your years will never end." This Scripture, along with many like it ["The heavens and the Earth will pass away but my word will live forever"] show that God has create all things.  He may, indeed, have life on other worlds and planets.  He is infinite.  As I said before, we know the Angels existed before us and perhaps life on other plantes exists as well.   God's teaching to us in Holy Scripture is that he has created everything and reconciled everthing in and through his son Jesus Christ.  The universe will pass away but God will endure forever.  I would imagine that all life justifed by Christ will live while the disobedient [demons and all]  will be imprisoned forever. Here is the point: don't let anyone confuse your faith by talking about "aliens" or "UFOs."  I find it interesting that these  "UFOs" never seem to contact humanity with any kind of positive or uplifting message because they are only demons in disguise.  This is the  'strong delusion' Holy Scripture talks about for The End of Days.  Someday the anti-Christ will appear.   Don't be surprised if he uses this deception to try to confuse the church and mislead the godless masses.  There is much in our history that still needs to play out, including the Second Coming of Jesus.  I believe Satan is the author of this deception and is ready to use the 'possibility' of Alien life to persecute the church.  God has a plan to save us while Satan is working his plan to destroy as many people as possible.  Thus, like I said, don't let the deception of alien life keep you from believing in the salvation that is being offered in Jesus.  The Lord Himself stated in the Gospel of Matthew that in the end He would create a new Heaven and a new Earth.  God's plan for us and the universe has been revealed!  I, personally, believe strongly that He has taught me that there are no 'aliens' flying around in spaceships near our planet.  This is all but Satan in disquise.   Keep your faith in the Lord Jesus Christ to inherit the heavenly reward He has prepared for you since before this world even began. May the Lord Jesus Christ keep you in His perfect peace.