What is "jedi"

characters in the "Star Wars" sagas, 1977, apparently an invented word.

JEDI (Jupiter Energetic-particle Detector Instrument), is an instrument on the Juno spacecraft orbiting planet Jupiter. It is part of a suite of instruments to study the magnetosphere of Jupiter.

JEDI is designed to collect data on "energy, spectra, mass species (H, He, O, S), and angular distributions"; the plan is to study the energies and distribution of charged particles. It can detect them at between 30 keV and 1 GeV, whereas JADE, another instrument on the spacecraft, is designed to observe below 30 keV. One of the concepts being studied is that energy from Jupiter's rotation is being converted into its atmosphere and magnetosphere.

It is radiation hardened to collect in situ data on the planet's auroral magnetic field lines, the equatorial magnetosphere, and the polar ionosphere It was built by the Johns Hopkins University Applied Physics Laboratory (APL). One of the goals is to understand the aurora, and how particles are accelerated to such high speeds. One of the mysteries of Jupiter is that X-rays are emitted from the poles, but do not seem to come from the auroral ring.

Jedi is a game engine developed primarily by Ray Gresko for LucasArts. It is extremely similar to the Build engine used in Duke Nukem 3D. While not a true 3D engine, it supported a three-dimensional environment with no limitations in the 3rd dimension (Z). In Doom, environments or levels were limited to existing in the X-Y plane only — levels were laid out two-dimensionally: while floor and ceiling heights could differ, areas could not overlap vertically. The Jedi Engine had support for areas or rooms (called "sectors") on top of one another, a trait that it shared with the Build engine. In the Dark Forces revision of the engine, the renderer could not display two rooms situated on top of each other at the same time. This capability was added for Outlaws.

The Jedi Engine also included the ability to jump and crouch, the ability to look up and down, and atmospheric effects (achieved by careful manipulation of 256-color palette files). The engine is limited in its rendering capabilities, however, and used two-dimensional sprites (pre-rendered in different angles) for most of its object graphics.

The Jedi Engine's lifetime was short lived, being used in two titles, Star Wars: Dark Forces and Outlaws. The sequel to Dark Forces, Jedi Knight, used the Sith engine.

It was sometimes rumored that Jedi was a product of reverse-engineering the Doom engine to find out how to build their own. The large differences in the internal structure of the maps and the way elements such as textures are used make the claims somewhat suspect.

Jedi are the fictional adherents of the warrior discipline in Star Wars films.

Jedi may also refer to:

• Jedi, abbreviation for the film Return of the Jedi
• Jedi, adherent(s) of Jediism
• Jedi (game engine), a game engine developed primarily by Ray Gresko for LucasArts
• Jedi census phenomenon, a movement created in 2001 for people to record their religion as "Jedi" or "Jedi Knight" on the national census
• JediMUD, a text-based online role-playing game
• JEDI, instrument on the Juno spacecraft
• JEDI (Joint Energy Development Investments), a joint venture between Enron and CalPERS
• Jedi Knight, abbreviation for the videogame Star Wars: Jedi Knight
• Project Jedi Joint Endeavour of Delphi Innovators