Comet C/2021 O3 (PANSTARRS) seems to have fizzled out as far as I can ascertain. Ah, well, es la vida. As always there is no certainty about these things unless the Ever Living God directly informs us in one way or another. I know of no such information and only read about possible interpretations based on the assumption that the comet survived perihelion. As happens to so many sun-grazing or almost sun-grazing comets, the intense radiation of the sun was probably too much for it causing it to disintegrate. They are, for the most part, usually balls of ice and perhaps some rock. In any case, I do not believe God creates or does anything without purpose but I do believe that He does not give hidden signs, that He makes them visible for all or, at the very least, for all who would have some meaningful interest in the indicator, without the need for optical or other special instruments. That is why I gave consideration to whether or not it would brighten to naked-eye visibility if it survived perihelion. However, I do not believe God ever has or ever will do something, anything at all, without meaning or purpose. So, the purpose of this? Who knows? Was it an early warning? Was the comet's expected trajectory an indicator of the approach of eternity and its destruction a warning of what is to come? Was it telling us that although mankind hopes to escape death by his own power, it can never happen? Or is it something along the lines of the idea, the widespread false belief, that there are cycles of the world but it is delusion and the current, true, one-shot trajectory will come to a sudden end? One can guess this way all day long and yet be no closer to a useful understanding. I hope that is clear from how I invented some whacky ideas just there which one could shoe-horn into the event as being somehow meaningful and create an entire dialogue based on nothing more than a blown-up comet, unusual as its trajectory may have been. If it did make it past the sun and brighten unusually until visible to the naked eye at least at dusk or dawn and then across the constelation of Cetus and so forth, then, and only then could we make anything more of it, only then could my prior conjectures carry any even vague potential in signifying some kind of warning or sign to the world, if anything at all, but, as it stands, we've got nothing, zilch.
By profession, I am an electronics engineer with a background mostly in communications and I have a pretty firm grasp on the concepts of data, of information, of irreducible complexity and high specificity (what I would sometimes describe all together as complex information and its structural resolution) and of the relationships between such things, their abstract nature and the need for interpretation. I must emphasize that it is important to never "see" more information in a sign (what we would call a "signal") than what the sign itself can provide in the context of its event (the content of the signal in the context of its wider purpose, remembering always that signal content is interpreted by a mind and is not inherent in the signal or even in its physical context). Perhaps it is part of a greater sign so that, taken on its own, we have only one piece of a puzzle and can make nothing of it at this stage. Again, who knows? Let the ideas flow freely but take nothing at face value and give no idea favoured prominence in thought unless there is verifiable and independent reason for doing so.
Whatever the purpose of having us discover such a comet and then destroying it, perhaps we will only come to understand it in time, as is almost always the case with signs of this type, that is, comets and such, and there have been many of them, perhaps mostly of inconsequential purpose with respect to our journey through this presently ephemeral existence I will, however, reiterate that God does nothing, nothing at all, without purpose, even if that purose does seem inconsequential to us. If He does meaningless things then He has not made it known to me or anyone I know, but I cannot imagine such a thing or at least not at this point.
Whatever this year brings, whatever surprises are around the corner, always remember that God is your only safety, through Christ our Lord and Saviour. There is no other rock, I know not one.