Blue Sky was near Kzinti space though, which was why it was the most heavily militarized world in Human Space. Heavily populated too. Many Terrans who had been denied a birthright on Earth ended up on Blue Sky. It would have been a popular choice anyway, with its earthlike gravity and climate. But unlike some of the other colony worlds, there were no restrictions on immigration and no Fertility Board. For whatever reason, Blue Sky wanted a high population.