Book Summary
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It turns out that if you accelerate at 1 G for several years, you can reach almost any destination in the universe. After a few years have passed [traveling at that rate], the effects of relativity really start to add up. When 3 years have passed for you ... you'll have traveled nearly 10 light-years - far enough to reach many nearby stars. If you continue accelerating, it would take you less than 20 years of your time to reach a neighboring galaxy. If you keep pressing the accelerator for a little over two decades, you'll find your vehicle traveling billions of light-years per subjective "year", carrying you across a substantial fraction of the observable universe.
