If you put a giant mirror a light year into space from Earth, and then someone on Earth looked at it (through a telescope or whatever), would you see yourself 2 years in the past? One year for the light to get to the mirror, and one year for it to get back.
In principle, your idea is right. If we were to set a huge mirror, say, 1 light year away, the light from Earth would take one year to get there and another year to travel back here. So, if we had a telescope with great enough resolution to see the mirror, we would see in 2012 what is taking place today.
Of course, there are huge problems to overcome. Apart from the technical difficulties to construct such a mirror, travel enormous distances through space and setting it up in such a way as to always face the Earth as she orbits the Sun, there is also the problem that light will diffuse through space, be absorbed by interstellar dust etc.
Once you start looking in the mirror, you won't see a thing until 2 years later...
So once it's there, watch it. Then exactly two years later you would see yourself.
Exactly. 'Two light years' means that it would take two years for the light reflected off of the mirror to travel back to Earth for you to see. Remember, when you 'see' something you're just seeing the light reflected off of it. Of course, you wouldn't be seeing your current reflection (that light would still be making the 2-year journey from the mirror to your eyes), you'd see your reflection from two years ago.
I don't see this as a theory to 'stump' anyone. Fairly logical. Since we can only see things away from us in light years(take another galaxy perhaps), you would see the history of that galaxy. Hah, those galaxies quite a ways away aren't alive anymore today. We see it's history. So your theory of seeing yourself two years in the past will most likely be true.
sir, you my have just started i scientific breakthrough.
Actually, this was already known. If you were to get a probe of some sort, and rocket said probe off into the vast emptiness of space. You would realize the galaxies behind us, will be aged, and most likely destroyed. The stars will have their supernovas, blackholes will be formed. And galaxies in front of us, are babies, brand new galaxies. It depends on what direction we look.
Yeah, I just started thinking about it when my science teacher told us that %25 of the stars in the night sky have gone supernova and aren't actually there anymore.
Yeah, I just started thinking about it when my science teacher told us that %25 of the stars in the night sky have gone supernova and aren't actually there anymore.
Your science teacher is speaking whats true. Listen to his wise knowledge, of whatever grade you're in.
aw gees
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aw gees
Exactly. 'Two light years' means that it would take two years for the light reflected off of the mirror to travel back to Earth for you to see. Remember, when you 'see' something you're just seeing the light reflected off of it. Of course, you wouldn't be seeing your current reflection (that light would still be making the 2-year journey from the mirror to your eyes), you'd see your reflection from two years ago.
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Mine too. I've never been great at science.
I could tell by your avatar
:Smirk:
I'm allergic to creepers, I'm obsessed with iron, and I love fish
People have thought about this before OP.
Actually, this was already known. If you were to get a probe of some sort, and rocket said probe off into the vast emptiness of space. You would realize the galaxies behind us, will be aged, and most likely destroyed. The stars will have their supernovas, blackholes will be formed. And galaxies in front of us, are babies, brand new galaxies. It depends on what direction we look.
Damn it, GravCat, you ninja'd me. :/
Yeah, I just started thinking about it when my science teacher told us that %25 of the stars in the night sky have gone supernova and aren't actually there anymore.
aw gees
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Your science teacher is speaking whats true. Listen to his wise knowledge, of whatever grade you're in.
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