Past comments by the WTS re life on other planets, now or future:
Worldwide Security p 184 22 The God of the "Prince of Peace" Becomes "All Things to Everyone" ***
To all eternity our earth will bear a distinction that no other planet throughout endless space will enjoy, though the earth may not be the only planet that will ever be inhabited
. Uniquely, it will be where Jehovah has indisputably vindicated his universal sovereignty, establishing an eternal and universal legal precedent. It will be the only planet on which Jehovah of armies will have fought "the war of the great day of God the Almighty." It will be the only planet to which God sent his dearest Son to become a man and die in order to recover the planet?s inhabitants from sin and death. It will be the only planet from which Jehovah will have taken 144,000 of its inhabitants to be "heirs indeed of God, but joint heirs with Christ."?Romans 8:17.
w54 3/1 159 Questions From Readers ***
The publishers of "New Heavens and a New Earth"
are well aware that some have speculated about creatures from earth as being taken to other planets to populate them, and the way some of these speculators talk it exalts their importance and makes it sound as though Jehovah needs men of the earth to complete his work of creation relative to other planets
, and it is with such presumptuousness in view that the book said Jehovah does not need them. The expression about not needing them is designedly used to refute these unvoiced assumptions of God?s need of human couples on the part of those voicing such private interpretations. To preach that Jehovah?s purpose is to populate the other planets with couples from earth does make such couples necessary for his purpose. If it were his purpose to do it in that way, then he would be in need of such couples; otherwise he would have to do it in a way other than what he had purposed. If he did not use them his purpose to do it in that way would fail. So for these reasons the book had grounds for brushing aside this assumed need of Jehovah for human couples.
w54 3/1 159 Questions From Readers ***Whether there are other planets like the earth in other parts of the universe or not, and, if so, whether any of them are inhabited by some kind of life or not, or whether any of them ever will be so inhabited in the future or not, we cannot say because the Bible does not say. To concern ourselves with such questions is idle speculation, and we could never arrive at any definite answer. We can say, however, that there are no Scriptural grounds for contending that any future populating of other planets will be done by transporting couples from earth
. The earth and the people on it are not that important. If Jehovah wanted flesh-and-blood creatures on other planets he could easily make them from the dust of those planets, and not need to miraculously transport earthly couples through light-years of space. It is well for us not to exalt ourselves to such a spectacular role in universal affairs, but concentrate on the earthly duties given us by our Creator. Remember what Jesus said: "Everyone that exalts himself will be humiliated, but he that humbles himself will be exalted."?Luke 18:14; 14:7-11, NW.
w65 11/15 703-4 Questions from Readers ***Even if the Creator should at some future time populate other planets?which is something that we do not know
?there still would be no need for repetition of Jesus? sacrifice and the vindication of Jehovah?s sovereignty.