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Hunter Brandon
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I'm new to Astrophysics but some scientists say that all time is happening at one time. How is this possible if the universe is still expanding
Are you referring to imaginary time? All imaginary time occurs in the present. If you think of regular time, where you can move forward into the future, or backward into the past, then imaginary time would allow you to move left or right through time, but only in the present.Hunter Brandon said:I'm new to Astrophysics but some scientists say that all time is happening at one time. How is this possible if the universe is still expanding
What does "left or right through time" mean ?|Glitch| said:Are you referring to imaginary time? All imaginary time occurs in the present. If you think of regular time, where you can move forward into the future, or backward into the past, then imaginary time would allow you to move left or right through time, but only in the present.
Something like Interstellar? I admit, I'm equally confused.phinds said:What does "left or right through time" mean ?
I haven't seen Interstellar, and I don't take my physics from movies so that doesn't clear things up.PWiz said:Something like Interstellar? I admit, I'm equally confused.
No, that's forwards and backwards. I don't think "left and right" has any meaning regarding time, which is why I asked glitch what he meansShafat Hasan said:I think "left or right" as in past and future?
Yeah, I was just saying that "left" and "right" in time doesn't make much sense to me either (I wasn't asking you to borrow flawed sci-fi physics:P ).phinds said:I haven't seen Interstellar, and I don't take my physics from movies so that doesn't clear things up.
OK, gotcha.PWiz said:Yeah, I was just saying that "left" and "right" in time doesn't make much sense to me either (I wasn't asking you to borrow flawed sci-fi physics:P ).
Shafat Hasan said:That is if you consider time as every "NOW" slice; then the PAST, PRESENT and FUTURE exists at any moment. Someone who is, suppose 1 million light years away, just suppose, and is moving towards us / away from us, then THEIR "NOW" slice will be directed at our PAST or FUTURE. Therefore from this you can conclude theoretically that every slice of time is in a "NOW" slice and that the PAST and FUTURE is just an illusion which works within space-time, and everything is in "NOW" or PRESENT state, and including PAST and FUTURE that we believe.
Think of it as moving through different dimensions of time. It is also not a concept from any science fiction movie, but rather based upon Special Relativity and quantum mechanics.phinds said:What does "left or right through time" mean ?
Time Theory in Astrophysics is a branch of astrophysics that focuses on understanding the concept of time in the context of the universe. It explores how time behaves in different cosmic environments and how it is affected by factors such as gravity, velocity, and mass.
In astrophysics, time is measured using a unit called the second, which is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom. This is the most precise way to measure time and is used in all astronomical calculations.
Time dilation is a phenomenon predicted by Einstein's theory of relativity, which states that time can appear to move at different rates depending on the observer's relative motion and the strength of the gravitational field. In astrophysics, this is observed in objects that are moving at high speeds or in areas with strong gravitational fields, such as near black holes.
While some theories in astrophysics, such as the theory of wormholes, suggest the possibility of time travel, it is currently considered impossible based on our current understanding of the universe. The concept of time travel also raises many paradoxes and has not been observed or proven in any scientific experiments.
Time Theory in Astrophysics has significant implications for our understanding of the universe and how it evolves over time. It helps us understand the behavior of objects in extreme environments and provides valuable insights into the origins of the universe. It also plays a crucial role in the development of technologies such as GPS and satellite communication, which rely on precise measurements of time.