It is ridiculous.
Let's take the astro- disciplines at their word. Light travels at such-and-such a speed so therefore traverses a certain distance in a year. It follows that an event 4-light-years away (Proxima Centauri exploding, say) would be seen in America four years after it actually happened.
Alternatively, the explosion observed here would have occurred four years previously.
Not wishing to leave out any option, however absurd, I'll include that the explosion happens exactly when we see it but the exploding object gets catapulted backwards in time. An astro- can do the calculation about velocity of catapulting, in this case an astrophysicist. Or perhaps a string theorist.
OK. We know what they say, it gets plastered across all available media every time a comet appears or some bright object blinks on. My précis is for reference only.



The W.M. Keck Observatory


The ruler in my earlier post is convenient for a visual aid; according to the astro- mob Albinoni blew up all those millennia ago and the light's been whizzing along through boundless emptiness all the way to Keck. I'll even allow a bit extra for the time before it exploded, since there'd have to be something there to detonate in the first place. A billion years, maybe? This would be well down on my ruler but here's the rub. Whether or not we have telescopes or any theories about what we see, some facts are so well established that they become axiomatic. Whenever that light set off and however many trillions of miles you'd claim it traversed, no light from any star was in transit to anywhere in any universe which did not contain the world we live in. In other words, the yellow tip on that ruler would need to extend all the way down with stars shooting out light even before the earth was dreamed of.
In order to emit light an object needs to exist. But however much you stretch out the creation epoch.—.someone suggested a million years per day in an earlier post and I used that in my previous example.—.whether a day represents one-billion or two- or three-billion years or even a trillion years you'll never get to a point where there were stars before the earth.
The only possibility I can think of is for the light to have negative velocity racing backwards in time to the tune of however distant in lightyears the object is supposed to have beeen from the observer.
But that is ridiculous.
1. https://www.space.com/26385-keck-observatory.html
2. http://www2.lbl.gov/supernova/albinoni.html
. . .a supernova that exploded almost 10 billion years ago, the oldest confirmed supernova ever found.
. . .Nicknamed Albinoni by its discoverers it is also the most distant confirmed supernova, estimated to
. . .be some 18 billion light-years away.
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