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The circumzenithal arc, also called the circumzenith arc (CZA), the upside-down rainbow, and the Bravais arc, [1] is an optical phenomenon similar in appearance to a rainbow, but belonging to the family of halos arising from refraction of sunlight through ice crystals, generally in cirrus or cirrostratus clouds, rather than from raindrops.
[1] [3] Arguably the best way of distinguishing the halo from the arc is to carefully study the difference in colour and brightness. The 46° halo is six times fainter than the 22° halo and generally white with a possible red inner edge. The supralateral arc, in contrast, can even be confused with the rainbow with clear blue and green strokes. [1]
A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk') [1] is an optical phenomenon produced by light (typically from the Sun or Moon) interacting with ice crystals suspended in the atmosphere. Halos can have many forms, ranging from colored or white rings to arcs and spots in the sky.
The misleading term "fire rainbow" is sometimes used to describe this phenomenon, although it is neither a rainbow, nor related in any way to fire. The term, apparently coined in 2006, [ 3 ] may originate in the occasional appearance of the arc as "flames" in the sky, when it occurs in fragmentary cirrus clouds.
Halo franchise logo. Halo is a science fiction video game franchise created by Bungie and owned and published by Xbox Game Studios.Central to the Halo series are the three first-person shooter video games Halo: Combat Evolved, Halo 2 and Halo 3; novelizations, soundtracks, and other media are also available.
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According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.
Halo: Nightfall—a series of weekly, episodic digital videos directed by Sergio Mimica-Gezzan and produced by Ridley Scott—launched soon after the collection was released. The series was designed to connect the stories of previous Halo games to the upcoming Halo 5. [3] The Halo 5 beta launched on December 29, 2014, and ran until January 18 ...