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Delta Eridani, which is Latinized from δ Eridani, is the fifth-brightest star in the constellation of Eridanus.. The star is visible to the naked eye and has been observed to vary slightly in brightness between magnitudes 3.51 and 3.56, [2] although subsequent observations did not bear this out. [11]
Optical phenomena encompass a broad range of events, including those caused by atmospheric optical properties, other natural occurrences, man-made effects, and interactions involving human vision (entoptic phenomena).
Solar halo at the Alta Ski Area near the Snowpine lift on February 12, 2023 Long exposure of a night-time lunar halo display, including an upper tangent arc , 22° halo , and paraselenic circle A circumscribed halo (outer ring, partially visible on the bottom left and top left/right) together with a 22° halo (inner ring)
A sun dog (or sundog) or mock sun, also called a parhelion [1] (plural parhelia) in atmospheric science, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Sun. Two sun dogs often flank the Sun within a 22° halo.
Lunar corona A solar corona up Beinn Mhòr (South Uist). In meteorology, a corona (plural coronae) is an optical phenomenon produced by the diffraction of sunlight or moonlight (or, occasionally, bright starlight or planetlight) [1] by individual small water droplets and sometimes tiny ice crystals of a cloud or on a foggy glass surface.
Their apparent convergence in the sky is a visual illusion from linear perspective. The same illusion causes the apparent convergence of parallel lines on a long straight road or hallway at a distant vanishing point. [1] The scattering particles that make sunlight visible may be air molecules or particulates. [2]
A 26-year-old is making history, becoming the first artist to partner with the NFL to create a special logo and theme art for Super Bowl LIX. Tahj Williams, a queen of the Golden Eagles Mardi Gras ...
For over 100 years, research on the Moon illusion has been conducted by vision scientists who invariably have been psychologists specializing in human perception. After reviewing the many different explanations in their 2002 book The Mystery of the Moon Illusion, Ross and Plug concluded "No single theory has emerged victorious". [10]