Linked Questions

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1answer
156 views

Are space mirrors that show our historical past past possible? [duplicate]

Say nothing new can be learned anymore about the past by mere historical deduction from the present. Can a giant mirror-like thing out there that's let's say 2000 light years away from earth (and has ...
0
votes
3answers
95 views

Looking at past events by observing sky? [duplicate]

Since solar system (and our galaxy) is constantly in motion at a great speed, is it possible that we can look at our own image as it was sometime ago? Since the light of that age takes sometime to ...
0
votes
1answer
33 views

Can others see us many years ago relative to them? [duplicate]

In theory can entities in future spacetime look "back in time" to us, as we look back in time to other entities light years away, or is time simply a function of the distance and distance determines ...
0
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0answers
20 views

Can we see our past from a distant heavenly body? [duplicate]

Lets assume that a fictitious planet called Planet L is 10 light years away. Also,lets assume that it is inhabited by fictitious aliens.These fictitious aliens have high resolution telescope which can ...
38
votes
8answers
8k views

Will we ever be able to view the past?

By analogy with the sun, whose light is apparently reaching us in 8 minutes, it means that we are only viewing the sun 8 minutes ago when we look up at it. However, what if we were eventually able to ...
1
vote
3answers
3k views

Is it possible to hear the past?

From this Stack Exchange Physics Post, I am certain that it is possible to view the past. But then this interesting question came to me. Is it possible to hear the past? Ok, you might say, "Well, ...
2
votes
4answers
376 views

Is it feasible to detect light emitted from planet earth 2,000 years ago by reflection from an object situated 1000 light years away?

The possibility though remote, is intriguing as we may be able in the future to actually "see" our own planet's history. Though sounding science fiction, if we are able to detect bodies in space that ...
5
votes
3answers
463 views

Is my grandmother alive for some alien who is located on some place and is moving with some speed?

(I am science fiction writer. I had a goal in my novel to argue that time travel to past will not be available even in future. I asked here how to argue that. I collected answers and analyzed them and ...
3
votes
2answers
684 views

A mirror in the sky to look at past Earth

Earth reflects light from Sun into Space; are there any "mirror like" objects which reflect back to Earth this light? Has anyone been able to use this method to recover some information on how was the ...
1
vote
3answers
521 views

Could we enable ourselves to send messages to and receive messages from the future?

Based on John Isaacks' question, "If you view the Earth from far enough away can you observe its past?" and the responses, it appears that we could use mirrors to see into the past. Using Vintage's ...
0
votes
2answers
114 views

Does every past state of the Earth currently “travel” through the universe?

So I just read this question. The 27 year old user asks if it would be possible to see his own birth if he would be 27 lightyears away from the earth and the answer states ...
1
vote
1answer
139 views

Looking backwards in time at yourself

If a person on Earth today is looking at a star, say, 10 billion light years away, is it possible that some of the atoms he is looking at will eventually go on to make him?
0
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2answers
148 views

is there a way to capture scenes from past? [closed]

Is there a way to capture scenes from past for ex/ capturing someones sound which lived before long time ago.. if yes, how? and if no, why? Regards
0
votes
1answer
67 views

Observing the past

Suppose that we have a massive stellar object in space, so massive that it can cause significant lensing. It is also theoretically possible to turn light by 180 degrees (u-turn).So, assuming this body ...