There are lots of things that are considered perfectly acceptable. provided they don't work. And of course everyone knows they really don't, which is why they're acceptable....
Child, it was, of the now ancient H-bomb. New. Untested. Would its terrible power sweep the stark Saturnian moon of Titan from space. or miraculously create a flourishing paradise-colony?
On the day that the theft of the solar system's light begins, Burl Denning is with an archaeological expedition in the Andes. Within hours the U.S. Air Force has ordered the expedition to investigate the strange phenomenon that is causing a dimness and a drop in temperature throughout the world. This is the start of a fantastic adventure that takes Burl on the first circumnavigation of the solar system on the Magellan. Each planet-fall brings unexpected hazards, as the ship draws closer.
Alan Green was not exactly a hero. In fact he liked peace just as well as the next man. Not that he was really afraid of that crazy, hot-blooded hound-dog Alzo, or even of the hound's gorgeous owner, the Duchess Zuni--who was also hot-blooded (to say nothing of the Duke). After all, these things were understood on this backward, violent planet, and a man could manage, provided he was alert twenty-four hours a day.
Just speculate for a moment on the enormous challenge to archeology when interplanetary flight is possible. and relics are found of a race extinct for half a million years! A race, incidentally, that was scientifically so far in advance of ours that they held the secret of the restoration of life! One member of that race can be brought back after 500,000 years of death....
Bron is the offspring of infamous space pirates but instead of following in the family footsteps he decides to become an electronic engineer. Unfortunately, every time he tries to get out, something pulls him back in.
THREE AGAINST THE STARS! A sky pirate armed with superior weapons of his own invention... First contact with an alien race dangerous enough to threaten the safety of two planets... The arrival of an unseen dark sun whose attendant marauders aimed at the very end of civilization in this Solar System...
A Time Traders/Ross Murdock Story Key Out of Time -the fourth book in the Time Traders series, following The Time Traders, Galactic Derelict, and The Defiant Agents- again features Ross Murdock as the hero. Accompanying a group of settlers to the now-empty water-planet Hawaika, he is sent back in time through a Time Gate... and must learn to survive ten thousand years in the past!
The star Mira was unpredictably variable. Sometimes it was blazing, brilliant and hot. Other times it was oddly dim, cool, shedding little warmth on its many planets. Gresth Gkae, leader of the Mirans, was seeking a better star, one to which his "people" could migrate. That star had to be steady, reliable, with a good planetary system. And in his astronomical searching, he found Sol.