They say that when we look up to see stars, we’re actually seeing the light from dead stars. So technically, we can’t see what’s out there in the present? What do you think is out there now? is it just new, modern stars or we don’t get to see anything at all? (since by now, everything has expanded billions of miles apart from each other that light is far from anything to reach)
In: Planetary Science
They’re not all dead, just some of them. And yes, there are just other stars that we can’t see because the light from them hasn’t reached us yet.
An alien living 1 billion light years away would see our galaxy as it was 1 billion years ago. Our galaxy still has plenty of stars, sure some the aliens see will have died but new stars were born and replaced them.
You answered your own question. It’s just new, modern stars whose light hasn’t reached us yet. Eventually the rate at which the universe is expanding will mean that new stars are too far away/moving away too fast for their light to *ever* reach us, but that’s still a long way off.
Technically yes there are new stars out there where the light hasn’t reached us yet, but I just wanna add that every star you can see with the naked eye is within a few hundred to a few thousand light years away, so it’s safe to say that nearly all of them are still alive.
What “they’re” saying is largely wrong.
We’re seeing light from the past because light takes time to travel to us from where it is. but the star is almost certainly still there. We pretty much exclusively see with our eyes only stars in our own galaxy which are at most 100,000-150,000 light years away. Stars typically live for millions of years and can even live up to trillions.
What does “now” even mean if you’re talking about a point in space that is so far away that any hint of its existence won’t be “here” until long after humanity is gone. There is no meaningful relationship in space or time between us and such a place. That is, it isn’t sensible to assign a word constrained by our idea of reality to something so far beyond it.
The vast majority of stars that you can see with the naked eye are actually relatively close, within a couple of thousand light-years. There’s still plenty of room for some of them to be alive and kicking.
As for what’s alive out there now? Odds are, more of the same. More stars, new stars, stellar remnants.
Who says they’re dead? They’re just older now
The fun part is that some have exploded millions of years ago and and by the time we see it, it would have been long gone
Just looking up you don’t see many, if any, dead stars. All the stars you see with your own eyes are in our own galaxy.
You need powerful telescopes to see stars that are old enough to be dead.
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