Guy Consolmagno SJ, a Jesuit brother and astronomer at the Vatican's observatories, has written a small book called "Intelligent Life in the Universe? Catholic belief and the search for extraterrestrial intelligent life." According the Independent Catholic News, the book, published by the Catholic Truth Society, raises such questions as:
Would humans recognise intelligent life if we saw it?Link
Could we communicate with it? Should we even try?
Is Original Sin something that affects all intelligent beings?
Is Jesus Christ's redemption valid for intelligent beings throughout the universe?
or would other worlds have their own version of Jesus?
Would the Church send missionaries to ET planets?