-if the explosion occured, and we're watching it with our telescope, and we are going to see it, when the photons reach earth... how is it not in our future?
Because the event has already happened.
there's nothing wrong with someone else thinking that it happened four minutes AFTER I clapped my hands. And that may well be what they see if they are travelling at an appropriate speed and direction relative to me and the Sun. -because they just saw the explosion and don't know it took 8 min. for the light to travel to earth? -Or is this not what you meant, and you're implying something about someone going very fast (and not on earth) and so their sense of time is different from ours on earth?
Its the latter. They need both the appropiate speed and direction.....
if what you say is true, then no one really has any "future" whatsoever.
Considering that time is another dimension and that the Universe has a 4D "shape" that we just happen to be experiencing a "slice" of, I could probably argue against there being any future.
Since everything happens in some sort of "elsewhere" (no matter how miniscule) before the light photons hit our eyes and we detect the event.
But what about things that haven't happened yet? They would still be in the fitire.
If what you say is true, neither case is in "our future" because the events happened before we saw them. Therefore, nothing at all is in "our future" because all events take some amount of time for us to detect them.
It doesn't follow.
How does an event happening before we see it mean that there cannot be events that have not happened yet?
So, if that's true, what is meant by the "future" light cone?
A light cone describes all the places that a flash of light can affect or be affected by over time. The future cone describes all the places that can "see" the light from the flash. The past cone describes all the places that the flash of light could have seen.
That is, if I can't say that light from an explosion on the sun is in our future (if I'm eventually going to see it), what can we say is actually in the future light cone?
The light is in your future even thought the event has already happened.
Onifire, both are attributes of energy, so yes, they are something that can be said to exist, they are part of the behaviour of energy. I suppose it ultimately comes to this fundamental question,:- If you travel along with a quantum of energy, where is time?
The answer is that it is not there.
It is not there because time is not an attribute of energy and because time is not an attribute of energy, it can have no physical properties to manipulate.
This means that time cannot truly effect energy and energy cannot truly effect time.
When I see the word "energy", the definition I'm used to is "the ability to do work".
What definition of "energy" are you using?
Spacetime" is the measurement in relativity, the measurements are relative to the state of the observer making the measurement.
This does not objectify space or time and turn either into an object.
They are useful ideas of measurement, but remain only ideas.
That time can be dilated shows that it is more than just an idea, that it is, in fact, a "thing".
If we fail in distinguishing between 'idea' and 'thing' we can never develop a true insight into the cosmos,we relate to ideas all the time, but treat them as things, but this does not make them objects of reality.
Last time I checked, the people who realize that time is a thing are the ones who are developing a true insight into the cosmos.
Regarding time as an idea has gotten us what?
Science fails to recognize the single most potent element of human existence. Letting the reigns go to the unfolding is faith, faith, faith, faith. Science has failed our world. Science has failed our Mother Earth. -System of a Down, "Science"
He who makes a beast out of himself, gets rid of the pain of being a man. -Avenged Sevenfold, "Bat Country"