Angels are spirits, not what we consider biological life. Yet, the Bible describes them as having sapient activity, so I would say they are definitely "alive" in a sense.
Agreed that these non-carbon based entities called angels are definitely animate entities that have an independent volition with the ability to make choices of themselves.
Yet it does not appear to me that they possess the breath of life; despite that they are also created by God. Creatures that possess the breath of life appear very much to be a different category.
Now what makes angels "alive"; though obviously in a different sense "alive", God only knows. The only thing we do know is that they aren't spirits in the same sense as God is Spirit because obviously they don't bear omniscience, omnipotence, omnipresence, immortality and existence that has no beginning and no end.
Ironically, though at one point several years ago, I was reading Ezekiel and found an interesting nuance in the Hebrew language that described the seraphim's "once dead" bodies.
Now the indication wasn't that they were "once dead" / "raised" but more in the context of that if the cosmos came under judgement to be destroyed and not recreated (i.e. if there was no atonement); then even these obedient angels would have been destroyed along with everything else that had been created and it would be "back to square one", where the only eternally existent entity was God.
Which leads into the next subject.
Maybe, maybe not. If deeds on this planet could corrupt life on another planet, that opens up a lot of questions and possibilities. But we don't know that in fact happened, even if intelligent life on another planet exists. Paul was clearly talking about life on Earth, that we know. I see no indication that he was describing anything that might have happened on another planet, or that such a possibility entered his mind.
This question (does the fall affect the rest of the cosmos) does seem self evident based on the fact that the entire cosmos is recreated. Yet how this is defined would depend on the answer to what is the scope of evil, as well as its origin.
Now from the very inception of creation we have "darkness upon the face of the deep". That's not just "absence of light" darkness; that Hebrew phrase carries the context of a "moral evil"; even though there was nothing in "the beginning" that evil could inhabit to create a fallen world. Unless angels were the very first entities created on day one.
Scripture is very clear that before "the beginning" nothing existed but God; so based on what we read in Job where the angels witness the creation of earth, we can conclude they would have been created on day one.
So if we have "darkness" (or "evil") existing from the inception of creation; where'd it come from? (I have a theory on that.)
I believe the inception of evil was the "opposite reaction" to God's creative action. (To every action is an equal and opposite reaction.) This "knowledge of good and evil" that God possessed before He created anything; was only theoretical until He "did" something. It is the "reaction" (every thing God is not) in the created realm.
Now this theory makes sense in that angels who aren't part of the "environment" of all things created on earth, are still subject to the fall. We know this because there are fallen angels. We also know that the potential to become corrupt pre-existed Adam's disobedience because Satan fell before Adam did. Note the tree in the garden was "the tree of the knowledge of good and evil"; not "the tree of good and evil".
So, because Scripture tells us the entire cosmos is recreated and we have angels who have fallen; this means that this destructive corruption involves more than just earth.
Now unless there are multiple worlds with various forms of "Adam" who endure their own "knowledge of good and evil" test; thus requiring their own form of the incarnation; then yeah, the fall of humanity would have manifested corruption in the entire universe.
Maybe. From one standpoint, it could be considered convenient, they would deserve no more dignity or protection than animals. A counterpoint to that is that the scope of
Genesis 1:28 is clearly limited to Earth and its animals, so we wouldn't have the divine right to subdue extraterrestrial worlds and beings like we do on this planet.
Again, this would depend on if there is only one "Adam". If there isn't; all those rules could potentially apply in reverse and they could subdue us, if the nature of their corruption is similar to ours.
Yet looking at the size of the universe and the limits of matter; it doesn't seem likely that creatures of this material universe would be capable of interstellar travel. At least in the universe as we understand it. There may be factors outside of what we can observe that we're not aware of.
If other worlds are like this one; any life could be literally tethered to the planet of its origin.
There was a Russian scientist prior to WWI; who'd posed a hypothesis that outer space is actually hot, not cold. His theory makes some sense given all the electromagnetic energy that comes off the sun. Radiation destroys life that's not protected. Thus the Van Allen belts; which themselves are intensely radioactive.
Now here's another controversial subject. NASA is trying to develop the Orion space craft to take humans to Mars. There's a video on YouTube that makes a very interesting statement about trying to shield the occupants of the craft from the radiation of the Van Allen belts. The only earth occupant we know went into the Van Allen belts was the Soviet dog Laka on Sputnik II; and.... the Australians recorded what happened to that poor dog!
So.... if you allegedly got through the Van Allen belts in 1969 with far inferior technology; what's the problem now guys?
Now here's a video that will have you scratching your head! And this is the History Channel!