In the Star Trek

Star Trek

Star Trek is an American science fiction entertainment franchise created by Gene Roddenberry. The core of Star Trek is its six television series: The Original Series, The Animated Series, The Next Generation, Deep Space Nine, Voyager, and Enterprise...

fictional universe, subspace is a feature of space-time

Spacetime

In physics, spacetime is any mathematical model that combines space and time into a single continuum. Spacetime is usually interpreted with space as being three-dimensional and time playing the role of a fourth dimension that is of a different sort from the spatial dimensions...

 which facilitates faster-than-light

Faster-than-light

Faster-than-light communications and travel refer to the propagation of information or matter faster than the speed of light....

 transit, in the form of interstellar travel or the transmission of information. Subspace obeys different laws of physics. Subspace has also been adopted and used in other fictional settings, such as the Stargate

Stargate

Stargate is a adventure military science fiction franchise, initially conceived by Roland Emmerich and Dean Devlin. The first film in the franchise was simply titled Stargate. It was originally released on October 28, 1994, by Metro-Goldwyn-Mayer and Carolco, and became a hit, grossing nearly...

franchise, the "Scott Pilgrim

Scott Pilgrim

Scott Pilgrim is a graphic novel series by Bryan Lee O'Malley. It consists of six digest size black-and-white volumes, released between August 2004 and July 2010, by Portland-based independent comic book publisher Oni Press. It was later republished by Fourth Estate, an imprint of HarperCollins...

" comics, the Hitchhiker's Guide to the Galaxy

The Hitchhiker's Guide to the Galaxy

The Hitchhiker's Guide to the Galaxy is a science fiction comedy series created by Douglas Adams. Originally a radio comedy broadcast on BBC Radio 4 in 1978, it was later adapted to other formats, and over several years it gradually became an international multi-media phenomenon...

 series, and the Descent: Freespace

Descent: FreeSpace

Descent: FreeSpace – The Great War is a 1998 space combat simulation IBM PC compatible computer game developed by Volition, Inc. when it was split off from Parallax Software. Published by Interplay Entertainment, it is also known as Conflict: FreeSpace – The Great War in Europe...

and Halo

Halo (series)

Halo is a multi-million dollar science fiction video game franchise created by Bungie and now managed by 343 Industries and owned by Microsoft Studios. The series centers on an interstellar war between humanity and a theocratic alliance of aliens known as the Covenant...

video games.

In most Star Trek series, subspace communications are a means to establish nearly instantaneous contact with people and places that are light-years away. The physics of Star Trek describe infinite speed (expressed as Warp 10

Warp drive (Star Trek)

Warp drive is a faster-than-light propulsion system in the setting of many science fiction works, most notably Star Trek. A spacecraft equipped with a warp drive may travel at velocities greater than that of light by many orders of magnitude, while circumventing the relativistic problem of time...

) as an impossibility; as such even subspace communications which putatively travel at speeds over Warp 9.9 may take hours or weeks to reach certain destinations. Since subspace signals do not degrade with the square of the distance as do other methods of communication utilizing conventional bands of the electromagnetic spectrum (i.e. radio waves), signals sent from a great distance can be expected to reach their destination at a predictable time and with little relative degradation (barring any random subspace interference or spatial anomalies.) However, in one episode of Star Trek: Voyager, the crew was able to achieve Warp 10, at the drawback of vastly accelerated evolution (the two crew members who traveled in Warp 10 evolved into lizards within a day, but were able to be converted back).