B What speed and direction are we actually traveling?

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Traveling at half the speed of light would allow for time dilation, but the effect would be minimal, resulting in only about 1.5 years of difference in aging over a 10-year flight. The Earth’s motion is relative, with no absolute speed or direction in the universe, meaning that the direction of travel is not crucial for achieving time dilation. The concept of relative motion is central, as all speeds are measured against chosen reference points, and changing reference frames through acceleration creates an asymmetry in aging. If one were to turn around and return to Earth, they would experience differential aging compared to those who remained on Earth. Understanding these principles is essential for grasping the implications of traveling through space at relativistic speeds.
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Thread will remain closed for now. Here is a helpful comment in the Mentor discussion about this poster and this thread:
Looking at his diagram, this is a basic relativity of simultaneity misunderstanding -(light signals from the common source in the center reach the detectors at the same time only in the frame in which the two detectors and the emitter are at rest) with a generous admixture of invalid clock synchronization assumptions.

I'd started a reply but am inclined to think that one of the earlier answers is better: read Taylor and Wheeler or equivalent, come back if you get stuck somewhere and we can help you over the hard spot.
 
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