"Proxima Centauri" is a science fiction short story by American writer Murray Leinster, originally published in the March 1935 issue of Astounding Stories. Unusually for the time, the story adhered to the laws of physics as they were known, showing a starship that was limited by the speed of light, and which took several years to travel between the stars. In his comments on the story in Before the Golden Age, Isaac Asimov thought that "Proxima Centauri" must have influenced Robert A. Heinlein's later story "Universe" and stated that it influenced his own Pebble in the Sky.