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The term ansible refers to a category of fictional technological devices capable of superluminal or faster-than-light communication. These devices can instantaneously transmit and receive messages across obstacles and vast distances, including between star systems and even galaxies. As a name for such a device, the word ansible first appeared in a 1966 novel by Ursula K. Le Guin. Since that time, the broad use of the term has continued in the works of numerous science-fiction authors, across a variety of settings and continuities. Related terms are ultraphone and ultrawave.

Coinage by Ursula Le Guin

Ursula K. Le Guin first used the word ansible in her 1966 novel Rocannon's World. Etymologically, the word was a contraction of answerable, as the device allowed its users to receive answers to their messages in a reasonable amount of time, even over interstellar distances.

The ansible was the basis for creating a specific kind of interstellar civilization, where communications between far-flung stars are instantaneous, but humans can only travel at relativistic speeds. Under these conditions, a full-fledged galactic empire is not possible, but there is a looser interstellar organization, in which several of Le Guin's protagonists are involved.

Although Le Guin invented the name ansible for this type of device (fleshed out with specific details in her fictional works), the broader concept of instantaneous superluminal or faster-than-light communication had previously existed in science fiction. Similar communication functions were included in a device called an “interocitor” in the 1952 novel This Island Earth by Raymond F. Jones, and the 1955 film based on the novel. Similarly in 1954, another of these devices called the "Dirac Communicator" appeared in James Blish's short story Beep, which was expanded into the 1974 novel The Quincunx of Time. Additionally, Robert A. Heinlein, in his 1958 novel Time for the Stars, employed instantaneous telepathic communication between identical twin pairs over interstellar distances, and like Le Guin, provided a technical explanation based on a non-Einsteinian principle of simultaneity.

In Le Guin's works

In her subsequent works, Le Guin continued to develop the concept of the ansible:

• In The Left Hand of Darkness (1969), Le Guin writes that the ansible "doesn't involve radio waves, or any form of energy. The principle it works on, the constant of simultaneity, is analogous in some ways to gravity ... One point has to be fixed, on a planet of certain mass, but the other end is portable."
• In The Word for World Is Forest (1972), Le Guin explains that in order for communication to work with any pair of ansibles, at least one "must be on a large-mass body, the other can be anywhere in the cosmos".
• In The Dispossessed (1974), Le Guin tells of the development of the theory leading up to the ansible.

Any ansible may be used to communicate through any other, by setting its coordinates to those of the receiving ansible. They have a limited bandwidth, which only allows for at most a few hundred characters of text to be communicated in any transaction of a dialog session, and are attached to a keyboard and small display to perform text messaging.

Use by later authors

Since Le Guin's conception of the ansible, the name of the device has been borrowed by numerous authors. While Le Guin's ansible was said to communicate "instantaneously", the name has also been adopted for devices capable of communication at finite speeds that are faster than light. David Langford publishes the science fiction fanzine and newsletter Ansible (magazine).

Orson Scott Card's works

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Orson Scott Card, in his 1977 novelette and 1985 novel Ender's Game and its sequels, used the term "ansible" as an unofficial name for the Philotic Parallax Instantaneous Communicator, a machine capable of communicating across infinite distances with no time delay. In Ender's Game, Colonel Graff states that "somebody dredged the name ansible out of an old book somewhere". In an answer on the question-and-answer website Quora, Card explained why he chose to reuse the word "ansible" for an FTL communication device instead of developing a new in-universe name for one:

In a FTL universe, you have several levels. can travel hyperfast, but no radio signal can outstrip your ship, you have to carry the mail with you. It's like the way things were between Europe and America before the laying of the successful transatlantic cable. But once it was laid, messages could be sent long before a ship could make the passage. That is like the ansible universe in Ursula K. LeGuin's early Hainish novels. Since I needed to use exactly that rule set, why not use the word — an excellent word — which I apply in the same way we all say 'robot,' an invented word that has entered the language, pay tribute to the writer from whose works I learned the word.

In the universe of the Ender's Game series, the ansible's functions involved a fictional subatomic particle, the philote. The two quarks inside a pi meson can be separated by an arbitrary distance, while remaining connected by "philotic rays". This concept is similar to quantum teleportation due to entanglement; however, in reality, quark confinement prevents quarks from being separated by any observable distance.

Card's version of the ansible was also featured in the video game Advent Rising, for which Card helped write the story, and in the movie Ender's Game, which was based on the book.

Other writers

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Numerous other writers have included ansibles and similar faster-than-light communication devices in their fictional works. Notable examples include:

• Christopher Rowley, in his 1986 novel Starhammer, describes the Deep Link, an instantaneous interstellar communicator. Most commonly used for messaging, it is capable of voice and video conversations as well, although the latter only at great expense
• Vernor Vinge, in the 1988 short story "The Blabber"
• Elizabeth Moon, in the 1995 novel Winning Colors
• Jason Jones, in the 1995 computer game Marathon 2: Durandal
• L.A. Graf, in the 1996 Star Trek: Deep Space Nine novel Time's Enemy
• The New Jedi Order, 1999, featured enemies, the Yuuzhan Vong, use organic communication devices known as villips, which can transmit over infinite distances thanks to telepathic connections formed while being harvested in groups
• Philip Pullman, in the 2000 novel The Amber Spyglass, part of the His Dark Materials trilogy
• Neal Asher, in his Polity series of novels including Gridlinked (2001), in which the runcible, named in homage to the ansible, is an interstellar wormhole generator/teleporter
• Dan Simmons, in the 2003 novel Ilium
• Liu Cixin, in the 2008 trilogy Remembrance of Earth's Past
• Kim Stanley Robinson, in the 2012 novel 2312
• Becky Chambers, in her Wayfarer novels, including the 2014 novel The Long Way to a Small, Angry Planet, and 2016 novel A Closed and Common Orbit
• L.J Cohen in the 2014 novel Derelict
• Neon Yang, in the 2017 novella Waiting on a Bright Moon
• Joe M. McDermott, in the 2017 novel The Fortress at the End of Time
• David Wellington, in the 2024 novel Revenant-X

See also

• Interstellar communication
• No-cloning theorem
• Quantum entanglement
• Superluminal communication
• Tachyon
• Tachyonic antitelephone

References

1. ^ Sheidlower, Jesse, ed. (July 6, 2008). "Ansible n." Historical Dictionary of Science Fiction (HD/SF). Retrieved January 2, 2025 – via JessesWord.com. This work-in-progress is a comprehensive quotation-based dictionary of the language of science fiction. The HD/SF is an offshoot of a project begun by the Oxford English Dictionary (though it is no longer formally affiliated with it). It is edited by Jesse Sheidlower.
2. Prucher, Jeff (2007). "ultrawave". Brave New Words: The Oxford Dictionary of Science Fiction. ISBN 978-0-19-530567-8.
3. Langford, David (2011). "Ultrawave". In Clute, John; Langford, David; Sleight, Graham (eds.). The Encyclopedia of Science Fiction (4th ed.). Retrieved December 4, 2022.
4. Bernardo, Susan M.; Murphy, Graham J. (2006). Ursula K. Le Guin: A Critical Companion (1st ed.). Westport, CT: Greenwood Press. p. 18. ISBN 0-313-33225-8.
5. Quinion, Michael. "Ansible". World Wide Words.
6. Le Guin, Ursula K. (March 15, 2022). Worlds of Exile & Illusion. Tor Essentials. New York, NY: Tor. ISBN 978-1-250-78126-0.
7. Nicholls, Peter "Dirac Communicator" in Clute, John and Nicholls, Peter eds. (1995) The Encyclopedia of Science Fiction. New York: St. Martin's Griffin, p. 337. ISBN 0-312-13486-X.
8. ^ Le Guin, Ursula K. (2001) . The Dispossessed (mass ppb. ed.). New York: Eos/HarperCollins. p. 276. ISBN 0-06-105488-7. They print Reumere's plans for the ansible. 'What is the ansible?' 'It's what he's calling an instantaneous communication device.'
9. ^ Card, Orson Scott (1994) . Ender's Game (mass ppb. ed.). New York: Tor Books. p. 249. ISBN 0-8125-5070-6. What matters is we built the ansible. The official name is Philotic Parallax Instantaneous Communicator, but somebody dredged the name ansible out of an old book somewhere and it caught on.
10. "Why did Orson Scott Card choose to reuse the word "ansible" for an FTL communication device instead of developing a new in-universe name for one -- Quora". Quora. Retrieved February 18, 2024.
11. ^ Card, Orson Scott (1991). Xenocide. Orbit. pp. 40–46. ISBN 978-1-85723-858-7.
12. "Ender's Game (2013) movie script". Springfield! Springfield!. Archived from the original on April 19, 2018.
13. Rowley, Christopher (1986) . Starhammer (mass ppb. ed.). New York: Ballantine Books. p. 151. ISBN 0-345-31490-5. ...the technology of the Deep Link, which gives us instant communications access across the deeps.
14. Vinge, Vernor (1988). "The Blabber". Threats & Other Promises. Riverdale, NY: Baen. p. 254. ISBN 0-671-69790-0. 'It's an ansible.' 'Surely they don't call it that!' 'No. But that's what it is.'
15. Moon, Elizabeth (1995). Winning Colors (mass ppb. ed.). Riverdale, NY: Baen. p. 89. ISBN 0-671-87677-5. ...when I was commissioned, we didn't have FTL communications except from planetary platforms. I was on Boarhound when they mounted the first shipboard ansible, and at first it was only one-way, from the planet to us.
16. Jones, Jason; Kirkpatrick, Greg (November 24, 1995). Marathon 2: Durandal. Bungie. A connection was left; awaiting the next quiet ; and though destroyed by the threes, it will scream over the void one time.
17. Graf, L.A. (1996). Time's Enemy. Star Trek: Deep Space Nine. Vol. Invasion, Book 3. Simon and Schuster. p. 203. ISBN 978-0-6715-4150-7. The two Dax symbionts can communicate with each other across space, instantaneously, because they're composed of identical quantum particles. I've become a living ansible, Benjamin.{{cite book}}: CS1 maint: multiple names: authors list (link)
18. Simmons, Dan (2003). Ilium (hbk. ed.). New York: Eos/HarperCollins. p. 98. ISBN 0-380-97893-8. I can see Nightenhelser madly taking notes on his recorder ansible.
19. Robinson, Kim Stanley (2012). 2312. Orbit. p. 227. ISBN 978-0-316-19280-4.
20. Yang, JY Neon (July 12, 2017). "Waiting on a Bright Moon". Tor.com. Retrieved September 10, 2020.
21. McDermott, Joe M. (2017). The Fortress at the End of Time. Tom Doherty Associates. p. 1. ISBN 978-0-7653-9280-0. We are born as memories and meat. The meat was spontaneously created in the ansible's quantum re-creation mechanism, built up from water vapor, hydrogen, carbon dioxide, and various other gases out of storage. The memory is what we carry across from one side of the ansible to the other, into the new flesh.
22. Wellington, David (2024). Revenant-X. New York, NY: Orbit. pp. 18, 105, 147, 150, 261, 364. ISBN 978-0-316-56935-4. p. 18: If we can find an ansible connection, we can send a signal back to Firewatch back on Earth, ask them to exfiltrate us, but that'll take what?

Further reading

• Bloom, Harold, ed. (1986). Ursula K. Le Guin (1st ed.). New York, NY: Chelsea House. ISBN 0-87754-659-2.

• Faster-than-light communication
• Fictional technology