Relativity of simltaneity not only means that one of your worlds and one of Tom's worlds coexist. All the past, present and future worlds of Tom, you, and anybody else coexist!
People moving relative to each other are in very different worlds of simultaneous events, but these events are all part of one and the same Spacetime map. The whole Spacetime map exists!
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- Relativity for Dummies
- 4D Spacetime Block Universe
- Reciprocal time dilation
- Reciprocal length contraction
- Lengths do not 'appear' contracted!
- Measuring the contracted train
- Constant light speed
- Where is the bullet?
- Train experiment
- Slower and shorter - case study
- Minkowski vs Loedel
- Spacetime video
- Further reading