eCosmology - My astronomy theory?

My astronomy theory?

So if something is 245 million light years away, we are actually looking at them as they were 245 million years ago. So what if, we managed to teleport someone 245 million light years away and has a powerful enough telescope, would he be able to see dinosaurs in earth? (im just a 14-year-old kid) Proof im 14: <a href="www.myspace.com/jazvdb>Click Here</a>

Public Comments

yes. but 245 million light years does not equate to 245 million years, becuase the universe is expanding. Its like an ant walking on a rubber band that stretches continuously. if you consider light to be te ant then in 245 million years it would have travelled more than 245 million light years.
I'd guess so, really cool thinking.
That sounds like a good theory, but light-years don't measure an actual amount of time. It measures the distance that light travels in one year, which is nine million million kilometers.
yes. so what? the speed of light has been known to be finite for 350 years.
The only problem is a teleport would still only work at light speed, so it would take 245 million years to reach that point in space.
Yes and if you had e.g. a planet that is reflecting like a mirror 122.5 light years away and a powerful enough telescope, you could see dinosaurs on earth without leaving earth. One interesting aspect of seeing in both time and space when we watch the sky is that the Big Bang is not one point but a sphere around us because the farther in time we see, the closer to the Big Bang we see. This is incidentally why the Cosmic Microwave Background, which is the radiation generated about 350 million years after the Big Bang, comes from all directions in the sky. Science is amazing, isn't it?
The answer is a resounding "Yes, but..." 1) There is no way of getting anyone anywhere at a rate faster than the speed of light. So that it would take at least 245 million years to get someone at a distance of 245 million light-years (even though the person would have the impression that the teleportation was instantaneous). 2) Let's assume that 1 is not a problem. Then yes, the person could see back 245 million years. However, if he sent a message back to Earth to tell of his findings, the message would take another 245 million years to get here. 3) there are interesting Science Fiction stories that assume possible ways around problems 1 and 2. In one particular story, the highlight of any space travel that happens to be in the right area includes a stop just as the right distance, so the passengers can see the day the Earthlings finally blew up their own planet... 4) At a distance of 245 million light-years, the size of telescope needed to see any detail on Earth would be... astronomical (probably the size of a few solar systems just for the main mirror). Let's see. A brontosaurus (now called apatosaurus) was almost 25 m long. 245 million light-years is around 2.3 x 10^24 m. So you need a telescope with a resolution of 1x10^-23 radians (an extremely small angle, something like trying to see a single proton on the surface of the Moon, from here). Using Dawes Limit (a formula to calculate the resolution power of telescopes), I find that the person would need a telescope with a diameter of around 50 light-years! Then, the brontosaurus would appear as a single dot. It is still a nice story to imagine. Another way is to imagine that (for whatever reason) another civilization built such a large mirror in space, and it happens to be around 75 million light-years from here. You happen to be looking through a very powerful telescope just as this mirror is oriented just right: You see the reflected light that left Earth 150 million years ago (the time at which apatosaurus actually existed). You are torn between the desire to tell others about this mirror, but you are also afraid that the perfect alignment will only last a few seconds, so you continue to observe. What could you see?
You are a liar. You're not 14. But if you are, and came up with this theory on your own, then you're pretty bright. I don't know when dinosaurs went extinct, so I wouldn't be able to answer your question about dinosaurs. But yes you're assumption is correct. Even when we look up at the night sky, we see zillions of stars, but many of the stars we "see" are not actually there, they've already become extinguished. It just takes years and years and years for the light to reach our eyeballs. So in essence it is kind of like looking into the past. For instance if we were to look through a powerful telescope at a planet 10 light years away, and we saw a being waving at us, that being wouldn't be waving at us, but it would be waving at something 10 years ago. Another interesting thought to think about is, if you were able to run faster than the speed of light and did so for about 2 seconds, then stopped and looked back, you would be able to see yourself at the starting line for about 2 seconds.
If there were dinosaurs 245 million years ago, yes, providing the teleportation was instantaneous. (the "If" is because of my own ignorance of when dinosaurs existed. It's not intended as sarcasm)
yeah but the one who is seeing that cant stay at the same place for 245m light years good question keep asking love to answer them
Assuming your teleportation machine works instantaneously as opposed to light speed, that is possible. There is one minor problem though. 245 million years ago was the early Triassic. Life was just recovering from the great mother of all extinctions and wasn't particularly interesting. The small ancestors of the the later dinosaurs would have been around, but not much more exciting than a lizard. A lot of reptiles and amphibians that wouldn't last out the triassic would still be around for a while. The early Triassic is rather boring for dinosaur enthusiasts. I'd chose a more recent period. A question to the person who gave me the thumbs down. Are you saying 245 MY is NOT the early Triassic? Are you saying the Permian extinction didn't occur? Are you suggesting that large dinosaurs walked the earth of the early Triassic? What are you saying I was wrong about? Please show me the errors of my ways.
Technically yes, but physically we cannot even come close.
Always think on the edge and out of the box kid. It's where all the great discoveries are found...
Or you could teleport a mirror 122.5 million light years away and watch dinosaurs without leaving home.
yeah sure..nerd
Well, that would certainly be one powerful telescope! But yes, you're correct in your thinking. You just don't know much about optics. :) Richard R. - don't get your panties in a bunch. Wasn't me, but some people give TD's in the hope of improving their chances of a best answer. I've seen it happen often. Me, I'm not here for the points. For me, it's mere recreation, plus the opportunity to feel superior.