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  2. Backscatter (photography) - Wikipedia

    en.wikipedia.org/wiki/Backscatter_(photography)

    A single orb in the center of the photo, at the person's knee level Main article: Spirit photography § "Orbs" Some ghost hunters have claimed that orb shaped visual artifacts appearing in photographs are spirits of the dead.

  3. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The first is characterized by "ghostlike" grey blobs perceived at the intersections of a white (or light-colored) grid on a black background. The grey blobs disappear when looking directly at an intersection. The second is constructed by superimposing white discs on the intersections of orthogonal gray bars on a black background.

  4. Spacer GIF - Wikipedia

    en.wikipedia.org/wiki/Spacer_GIF

    The reason a spacer GIF is invisible is so that an HTML developer can create a table cell and fill the background with a specific color that can be viewed through the transparent spacer GIF. For instance, a developer seeking to create a square blue box 500 pixels on a side could use a separate blue 500×500 graphic at the expense of additional ...

  5. Spirit photography - Wikipedia

    en.wikipedia.org/wiki/Spirit_photography

    Hill says that with the advent of digital photography, "the ghost light is re-imagined as an orb", and many paranormal-themed websites show pictures containing visual artifacts they refer to as "orbs" that are claimed and debated as evidence of spirit presence, especially among ghost hunters. [15] [16] [17] [18]

  6. Pentagon UFO videos - Wikipedia

    en.wikipedia.org/wiki/Pentagon_UFO_videos

    Sean M. Kirkpatrick, director of the Pentagon's All-domain Anomaly Resolution Office, briefed a Senate Armed Services subcommittee that it resembled a small "metallic orb". [ 35 ] [ 32 ] [ 36 ] [ 37 ] However Kirkpatrick said they are unable to fully identify anything from this video. [ 38 ]

  7. Entoptic phenomenon - Wikipedia

    en.wikipedia.org/wiki/Entoptic_phenomenon

    The light penetrates the eye and casts a shadow on the blood vessels as described previously. The light must be jiggled to defeat adaptation. Viewing in both cases is improved in a dark room while looking at a featureless background. This topic is discussed in more detail by Helmholtz.

  8. The Orb's Adventures Beyond the Ultraworld: Patterns and ...

    en.wikipedia.org/wiki/The_Orb's_Adventures_Beyond...

    The Orb's Adventures Beyond the Ultraworld: Patterns and Textures is a 1992 (see 1992 in music) video by the UK electronic music collective The Orb.It was filmed and recorded at a live performance at Brixton Fridge, London, 12 May 1991.

  9. Fixed stars - Wikipedia

    en.wikipedia.org/wiki/Fixed_stars

    The final orb in his model was that of the fixed stars. This final orb was the largest of his cosmos, in both diameter and thickness. This orb of stars is entirely fixed, as the stars are embedded in the sphere, and the sphere itself is immobile. [15]