The process seems instantaneous and unaffected by distance, making it the only practical means of communication for ships traveling many light-years away from Earth. The LRF has found that some twins and triplets can communicate with each other telepathically. Each starship has a much larger crew than necessary to maintain a more stable, long-term shipboard society, as well as to provide replacements for the inevitable deaths.
The vessels can continually accelerate, but cannot exceed the speed of light, so the voyages will last many years. The Long Range Foundation (LRF), a non-profit organization that funds expensive, long-term projects for the benefit of mankind, has built a dozen exploratory torchships to search for habitable planets to colonize. The basic plot line is derived from a 1911 thought experiment in special relativity, commonly called the twin paradox, proposed by French physicist Paul Langevin. Heinlein, published by Scribner's in 1956 as one of the Heinlein juveniles. Time for the Stars is a juvenile science fiction novel by American writer Robert A.
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