Earth's first starship, the Adastra, is approaching Proxima Centauri after a seven-year voyage. The voyage was marred by a mutiny among the crew, and the ship is still divided between a small group of officers who control the Adastra and the remainder of the crew, whom the officers refer to disparagingly as Muts, short for mutineers. A young Mut named Jack Gary has been picking up and studying transmissions from a race native to the Proxima Centauri system. This has earned him the confidence of Captain Bradley, the love of Bradley's daughter Helen, and the hatred of the Adastra'sfirst officer, Commander Alstair, who also has romantic designs upon Helen. Much to Alstair's disgust, Captain Bradley raises Gary to officer status in recognition of his work with the Centaurian transmissions. Shortly after the elderly Bradley's death, Gary discovers that a Centaurian spaceship is approaching the Adastra, and he suspects that their intention is hostile. The Centaurians confirm his suspicions when they fire a radiation beam at the ship. Although the Adastra has not been harmed, Alstair has the ship play dead to fool the Centaurians into thinking they have succeeded in wiping out the crew. The Centaurian ship docks with the Adastra, and a boarding party attacks the crew. The boarding party is defeated, and the Centaurian ship departs. Studying the captured leader of the Centaurian boarding party makes it clear that the Centaurians are mobile, carnivorous plants that feed on animals, and that they look on the crew of the Adastra as a highly valuable food source. Now that the Adastra has entered their system, the Centaurians will be able to trace their course back to Earth. As a fleet of Centaurian ships approaches the Adastra, Gary learns that Earth has launched a second starship for Proxima Centauri. The defenseless Adastra is surrounded by the Centaurian fleet, and boarded. The entire crew is consumed by Centaurians except for Alstair, Jack Gary, Helen Bradley, and half a dozen officers. The Centaurian leader orders all the Adastra's records, equipment, and animals sent on board an automated ship, along with Gary and Bradley. While Alstair and the remaining officers pilot the Adastra to Proxima Centauri I, the Centaurian homeworld, the automated ship will be flown to Proxima Centauri II, an Earthlike world that has long since been stripped of its native animal life and abandoned by the Centaurians. After Gary and Bradley land on Proxima Centauri II and release the animals there, Alstair reaches the Centaurian homeworld. Alstair rigs the Adastra's engines to explode, setting off a chain reaction that will destroy the Centaurian homeworld and exterminate the Centaurians, leaving Gary and Bradley to await the arrival of the next ship from Earth.
Reception
dismissed the story as "bottom of the trunk", with no virtues beyond "fast action". Everett F. Bleiler reported that the story contains "some good material, some cliche, and some nonsense," concluding that it "seems much less successful" than when it was originally published.
Story notes
As Asimov notes in Before the Golden Age, earlier writers such as E. E. Smith had ignored the lightspeed barrier in writing about interstellar travel. Leinster not only worked within the constraints of the theory of relativity, he even calculated that a trip to Proxima Centauri would take seven years if the ship traveled under a constant acceleration and deceleration of one gravity. Leinster also notes that such an acceleration would bring the ship to a significant fraction of the speed of light, though he fails to take account of the resulting time dilation, which would reduce the subjective length of the trip by at least two years. Asimov also writes, "The thing I remember most clearly over the years about 'Proxima Centauri' is the peculiar horror I felt at the thought of a race of intelligent plants that lusted after animal food. It is almost an unfailing recipe for a startling science fiction story to begin by inverting some thoroughly accepted situation, something so ordinary as to be almost disregarded. Of course, animals eat plants, and of course, animals are quick and more or less intelligent, while plants are motionless and utterly passive. But what if intelligent and carnivorous plants fed on animals, eh?"
Publication history
Sidewise in Time, edited by Murray Leinster, Shasta, 1950
Conquest of the Stars, Malian Press, 1952
Monsters and Such, edited by Murray Leinster, Avon, 1959
Before the Golden Age, edited by Isaac Asimov, Doubleday, 1974
