What you see in the night sky is virtualy not really there for real? the universe?

I did not read all your rant, it seemed repetitive, but 1) it is not virtual, it IS real. 2) Everything is in the past, light takes a finite amount of time to reach your eyes so even now as you gaze at your Computer monitor, you are seeing it in the past because the light from it takes a microsecond to reach your eyes, but ti IS real, touch it. 3) as for the maths, it's easy to take account of the delay, for instance the Andromeda Galaxy is 2.5 million light years away, so we see it as it was 2.5 mill years ago, more important we see it WHERE IT WAS 2.5 mill years ago, so a simple calculation tells us where it is today ( we know its velocity and direction. 4) Go outside tonight with binoculars and look at it , you are seeing history, but real history, like watching a newsreel of the second world war, it happened years ago, BUT IT HAPPENED. .

This is the third idiotic rant you post. You don't have to keep it up, you have proven beyond a reasonable doubt that you are an illiterate cretin.

*a keanu reeves style "whoa"* ok i will try to explain this as best i can. your first paragraph is basically right although exaggerates the distance (the andromeda galaxy is 2.4 million light years away, most of the stars you see with your naked eyes are much closer, only thousands of light years away.... unless you mean to talk about galaxies?). and in a sense a star that i am looking at tonight would not be in that exact position anymore, it would have moved at the very least or could have even exploded or something. your second paragraph kinda loses me.. in fact i don't think it even makes sense. you are saying that how can we make predictions on stars that are no longer there basically? even through the largest telescope you cannot see stars real time so to speak there is still the time lag based on how distant they are. the star might not be there but the light it emitted is, that light has been travelling for hundreds of years and that is the light we see in the telescope or when we look at it in the sky. what you have to remember is that everything is relative. imagine that you are standing there with your eyes covered and i walk by throwing peas at you. you can't see me but by the peas i throw you can tell generally where i am. you can even tell which direction i am in. but by the time a pea hits you i will have moved. basically that is what is happening with light. we see nothing in real time, light only travels so fast. it takes light 8 minutes just to get to the earth from the sun, so if the sun blew up we wouldn't even see it for 8 minutes. even the moon light takes 1.4 seconds to go from the moon to the earth. i'm not sure if i have answered your question but feel free to ask again if i have failed, but next time try to be a lot more clear.

"virtualy not there in real time" You make this great long rant and in the middle of it is the core of your confusion in that you use words in a sloppy way and you are caught in an old philosophical loop where people decide that only what humans sense is real - same kind of thing as "if a tree falls in a forest and no one [i.e. no human] hears it, does it make a sound? As relativity discusses and formalizes at length there is no "read time" except for a single observer. And observation, as you have discovered, is crisp and clear and only reports what light is delivering to us at that instant. You can't do better.

First, we must understand this : how does human eye work? The eye can see because there is light - light or visible light is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Vision begins when light rays are reflected off an object and enter the eyes through the cornea, the transparent outer covering of the eye (taken from www.aoa.org). The existence of an object may not parallel with what we "see" at the moment. Imagine sun rises every morning. You may "see" the sun rays, but maybe the sun is not up yet. When you use telescope, it gives you bigger/clearer version of the object, but not necessarily defines it existence by the moment the reflection of light reaches your eye. And don't forget to include the medium the light travels on. I can't give everyday example because light is very fast, even ray of sun only needs 8 minutes to reach earth. The one, we are talking about is star that might hundred times further. But, let me say that when the sun finally becomes a death star, we will know it 8 minutes later.

So how could we see this so good even though its virtually not there in real time ? Nothing ever is in real time you vision, thought have lag might be millionths of seconds but it is so. 80milliseconds It takes 499.0 seconds for light to travel from the Sun to your neighborhood. Light travels at a speed of 299,792 kilometers per second; 186,287 miles per second We could not go 100years distance from Earth but we can go to the Moon, the distance from Earth to the Moon is 1.3 light-seconds, so there we would see whats already happened on Earth 1.3sec ago. A powerful telescope cant show you such detail. Then this does this mean PLANET EARTH is really here , but there is lag. We Live In The Past

Actually, all you see in the night sky is pretty much as you see it. As the distances are so vast and and the lifetime of most stars so long, any changes from our perspective are minute. It's true that some very distant objects may not still exist, but that really only applies to things like Hubble images of far deeper space than you can see with the unaided eye. All even the largest telescope can do is amplify the light reaching it, but what it can do is store those photons until an image is built up giving us pictures of the Universe billions of years ago. Remember, on a cosmic scale, everything happens slowly, and movements of heavenly bodies can usually be predicted with a high degree of precision. However, some things are not so easy. It is widely known for instance, that the star Betelgeuse in Orion is close to collapse and becoming a super nova. However, close to in cosmological terms could easily be another million years, so don't hold your breath.

Light is the fastest thing in nature, but even it has a speed limit: 299,792,458 metres per second. The light given off by stars does take time to reach us, this is where the term light year comes from: the distance that light can travel in one earth year (which I believe is just under ten trillion kilometres) We can't possibly know what has happened to stars once their light has reached us. For example, a star 1000 light years away seems, now, just to twinkle calmly. But that is light that left the star 1000 years ago. A lot could have happened since then (well maybe not a lot), but if something happens to that star, we will only know about 1000 years later, when its light reaches earth. You are right, the stars we see now, may actually no longer exist, they could have exploded in a supernova, but we wouldn't know about it until their light reaches us. Even the light from the sun takes about 8 minutes to reach the earth :)

Actually, all you see in the night sky is pretty much as you see it. As the distances are so vast and and the lifetime of most stars so long, any changes from our perspective are minute. It's true that some very distant objects may not still exist, but that really only applies to things like Hubble images of far deeper space than you can see with the unaided eye. All even the largest telescope can do is amplify the light reaching it, but what it can do is store those photons until an image is built up giving us pictures of the Universe billions of years ago. Remember, on a cosmic scale, everything happens slowly, and movements of heavenly bodies can usually be predicted with a high degree of precision. However, some things are not so easy. It is widely known for instance, that the star Betelgeuse in Orion is close to collapse and becoming a super nova. However, close to in cosmological terms could easily be another million years, so don't hold your breath.