Gen 1:1 - "In the beginning, God created the heavens and the earth."

it doesn't explain every detail of "the heavens". The Bible is ambiguous on some stuff and, obviously, just doesn't address some things at all. So unless there is a specific passage that says there isn't, I'll operate under the assumption that a God that could create an entire universe could potentially put "life" on more than one planet. May/may not be "conscious" life as we know it, but it could be "life" nonetheless. The discovery of extraterrestrial life would not affect my faith one way or the other.