Man has identified and tracked planets around our sun for a few millennia. The latest Mars data have led scientists to believe that there once were conditions favorable to life on that planet. The scientific community is divided over the evidence of fossil bacteria from Martian meteors which have come to earth. However, man has yet to identify living life forms on any planet in our solar system.
Only in the last few years did man discover planets around other stars. More and more planets seem to be found all the time. The speculation of another earth-like planet is a fascinating concept.
The Bible speaks about life on our Earth and life in the spiritual realm (angels, God, Jesus, the Church) but does not seem to make any comments about other worlds or life on other worlds. Therefore, we cannot say definitively there is or is not life on other plants. We may reason on the subject, however.
Isaiah 45:18 reads, “For this is what the LORD says – he who created the heavens, he is God; he who fashioned and made the earth, he founded it; he did not create it to be empty, but formed it to be inhabited…” The KJV translates, “…he created it not in vain, he formed it to be inhabited…” If God did not create the earth in vain, but to be useful or inhabited, it seems reasonable to think that other planets were not created to be useless either. Other planets may have different life forms or may be used for their resources. We don’t know. God does know, but He has not revealed this aspect of His plan in the Bible.