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Table of Contents

                            Preface
Chapter 1 The Light Barrier
	Notes
Chapter 2 The Human BarrierEinstein’s Challenge
	Introduction
	Einstein’s conclusion
	Relativity  Light Barrier
	Einstein’s retraction
	Notes
Chapter 3 Anatomy of the Light Barrier
	Section 1. The second postulate close-up
	Section 2. The barrier: absolute, or only conditional
	Notes
Chapter 4 Acceleration Due to Light Pressure
	Analysis
	Light sailing
	A sop to the gods
	Notes
	Appendix 4A
	Appendix 4B
Chapter 5 Light Sailing Is Not All There Is
	Rocket dynamics
	Project SETI expanded
	The homesick Centaurians
	H. G. Wells’ time machine
	Einstein’s time machine
	What is the truth?
	Summing up
	Notes
Chapter 6 Einstein’s Conclusion and his Later Change of Mind
	Venerable force or cognitive illusion
	Compounding velocities
	Risky business
	Venerable force or kinematical perspective?
	The dreams of the young die hard
	Finally, we find, Einstein changed his mind
	Notes
Chapter 7 The Phase One Experiment: The First Starship
	PRESENT DAY
	FASTFORWARD TO 2040
		The mission
		Permission to come aboard, sir
		An academy in space
		Module arrangement of SS Alpha
		The mission begins
		The four-year voyage outward
		Are we there yet?
		San Salvador ho!
		Heading homeward
		Welcome home starman!
		Home and family
	Appendix to Chapter 7
Chapter 8 The Phase Two Experiment:Alpha Centauri or Bust!
	An extreme ride
	Born again
	A science experiment
	Getting under way
	Epilog
	Note
	Appendix to Chapter 8
		The John McCain Southern Arizona Starport Corridor
		Map of the John McCain Southern Arizona Starport Corridor
Chapter 9 Voyage to the Center of the Galaxy
	Notes
	Appendix to Chapter 9
		Megalopolitan exobiology
		Humanoid vision
		Do the Megalopolitans see in color?
		Notes continued
Chapter 10 An Hypothesis: There Is no Speed Barrier in the Universe
	Introduction
	Scientific Hypothesis
	An Open Question now
	Controversies
	Future possible research
	Notes
About the Authors
TIMELINE