What is an ansible?
The term was coined by author Ursula K. Le Guin in her first novel, published in 1966, and is derived from the word “answerable.”
An ansible is a category of fictional device or technology capable of instantaneous or superluminal (faster than light) communication. It can send and receive messages to and from a corresponding device over any distance or obstacle whatsoever with no delay. The term ansible is broadly shared across works of several science fiction authors, settings and continuities.
The name of the device has since been borrowed by authors such as Orson Scott Card, Vernor Vinge, Elizabeth Moon, Jason Jones, Kim Stanley Robinson, L.A. Graf, and Dan Simmons