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  2. List of DC Universe locations - Wikipedia

    en.wikipedia.org/wiki/List_of_DC_Universe_locations

    The location reappeared decades later in Final Crisis: Superman Beyond, also by Morrison, as the world on the edge of the multiverse past the Graveyard Universe of Earth-51. [117] This "comic book limbo" is metafictional , based on the notion that any character who has not been published recently can be said to reside in "comic book limbo".

  3. Lightmap - Wikipedia

    en.wikipedia.org/wiki/Lightmap

    They are usually flat, without information about the light's direction, whilst some game engines use multiple lightmaps to provide approximate directional information to combine with normal-maps. Lightmaps may also store separate precalculated components of lighting information for semi-dynamic lighting with shaders, such as ambient-occlusion ...

  4. Strömgren sphere - Wikipedia

    en.wikipedia.org/wiki/Strömgren_sphere

    The theory was derived by Bengt Strömgren in 1937 and later named Strömgren sphere after him. The Rosette Nebula is the most prominent example of this type of emission nebula from the H II-regions .

  5. List of Star Trek regions of space - Wikipedia

    en.wikipedia.org/wiki/List_of_Star_Trek_regions...

    The wormhole can only be traversed by ships traveling at impulse (sub-light speed) velocities. The Bajoran wormhole is discovered in the first episode of Star Trek: Deep Space Nine. It is found to connect the Bajor-B'Hava'el system in the Alpha Quadrant to the Idran system in the Gamma Quadrant, [3] which are seventy thousand light-years apart.

  6. Hill sphere - Wikipedia

    en.wikipedia.org/wiki/Hill_sphere

    The Hill sphere is a common model for the calculation of a gravitational sphere of influence. It is the most commonly used model to calculate the spatial extent of gravitational influence of an astronomical body ( m ) in which it dominates over the gravitational influence of other bodies, particularly a primary ( M ). [ 1 ]

  7. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    For example, one sphere that is described in Cartesian coordinates with the equation x 2 + y 2 + z 2 = c 2 can be described in spherical coordinates by the simple equation r = c. (In this system—shown here in the mathematics convention—the sphere is adapted as a unit sphere, where the radius is set to unity and then can generally be ignored ...

  8. Celestial sphere - Wikipedia

    en.wikipedia.org/wiki/Celestial_sphere

    Such globes map the constellations on the outside of a sphere, resulting in a mirror image of the constellations as seen from Earth. The oldest surviving example of such an artifact is the globe of the Farnese Atlas sculpture, a 2nd-century copy of an older ( Hellenistic period , ca. 120 BCE) work.

  9. By Inferno's Light - Wikipedia

    en.wikipedia.org/wiki/By_Inferno's_Light

    "By Inferno's Light" is the 113th episode of the television series Star Trek: Deep Space Nine, the 15th episode of the fifth season. Set in the 24th century, the series follows the adventures of the crew of the Starfleet-run space station Deep Space Nine near the planet Bajor, guarding a wormhole that connects the Alpha and Gamma Quadrants of the galaxy, as the Bajorans recover from a decades ...