The novel-hypothesis “The Love Coefficient, or the Mystery of Zero” is dedicated to proving that stellar flight is possible at sublight speed when the flow of time on a starship slows down according to Einstein’s theory, into which the concept of “mass ratio” should be introduced. The second novel “Reflection of the Stars” " - about the stay of astronauts on a twin planet during the Middle Ages. The hypothetical novels of the oldest Soviet science fiction writer pose moral problems and suggest possible scientific solutions.