5: Trekking through Spacetime Last updated Save as PDF Page ID 57727 Edwin F. Taylor & John Archibald Wheeler Massachusetts Institute of Technology via Self-Published (via W. H. Freeman and Co.) 5.1: Time? No. Spacetime Map? Yes. 5.2: Same Events; Different Free-float Frames 5.3: Invariant Hyperbola 5.4: Worldline 5.5: Length Along a Path 5.6: Wristwatch Time Along a Worldline 5.7: Kinked Worldline 5.8: Stretch Factor 5.9: Touring Spacetime Without a Reference Frame 5.10: End of Chapter 5.E: Trekking through Spacetime (Exercises) 5.S: Trekking through Spacetime (Summary)