Could this FTL idea with a fast moving large mass be possibl

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SUMMARY

This discussion explores a theoretical approach to achieving faster-than-light (FTL) travel by utilizing a high-speed singularity or large mass, specifically the Sun. The author proposes that if the Sun moves at a speed of 0.5c, the gravitational effects could stretch space, allowing it to appear to travel faster than light from a distant observation point. The theory hinges on the relationship between gravity and speed as described by relativity, suggesting that a large mass could be manipulated to achieve FTL travel without invoking complex concepts like subspace. However, experts caution that the fundamental principles of relativity dictate that nothing can exceed the speed of light in curved spacetime.

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michaellee8
Could this FTL idea with a fast moving large mass be possible?
I have recently come up with a possible way to achieve faster-than-light (FTL) travel by using a high speed singularity or large mass.

Background
As everyone knows, according to relativity, under normal conditions, it is impossible for anything initially slower than light become as fast as light or even faster, because anything with mass requires infinite energy to approach speed of light.

However, speed is not the only factor of relativity, gravity will affect it as well. There was an experiment shows that even light will bend as it travels near a strong gravitational field, for example Sun. That observation shows space can be stretched with strong gravity, and give some insight to this idea.

Observations
The experiment shows that if we take a point of observation in a position of small gravity, let say w, to observe something that travels along/near another point of observation, let say s, that is in effect of strong gravity. The speed we observes in w in will be slower than that of in s, that is vw < vs, where vs = c in this case.

Theory
How if we actually what moving is Sun itself, instead of object around it? Let’s assume it moves in a speed v = 0.5c, that is quite slow, but what is its speed to a point of observation with much smaller gravitational field, let say our Earth? Since the space around Sun is stretched according to our observation, if the Sun travels 1km, we should see it traveled more than 1km since the space around it is stretched to us, right? We let such ratio be r, where r > 1.

Let’s consider the new v that is very close to c, let say 0.9999c. Given a r > 1, let say 1.1, aren’t we are going to observe that the Sun travels faster than c since 0.9999c×1.1 > c? The Sun is moving FTL according to our observation! right? This way does not need any sort of subspace or even harder solutions, we just need a large mass and enough energy to push it fast enough. And this way does comply with relativity if we pit Sun as our point of observation, right?

Possible ways of testing
Although it is not so possible to let the Sun move in that speed, I believe we will be able to push Moon or other lighter mass to that kind of speed one day, and observes what will happen.

I think that is quite possible to create a small singularity or just some denser matter with those experiment devices we have today, and we can test the theory.

Conclusion
Can some experts on relativity tell me if there are any logical errors or mistakes in this dumb theory?
 
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You are misunderstanding how the speed of light limit works in curved space time. A better way of thinking about it is: nothing can win a race with a flash of light that is right next to it and moving in the same direction. No matter where you are and how you arrange things, the flash of light will always be moving faster than any object next to it.
 
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