Palos of the Dog Star PackWhat if ? These are the magic words that lie behind all good science fiction What if such and such, which today seems impossible, or hardly likely at best, could really happen? Thirty five years ago, when today's rocketry was no more than a dream, an impractical toy in the minds of most people, science fiction authors were writing romances which assumed that rockets to the moon and beyond might be built. Such stories formed much of the backbone of the