The circumzenithal arc, also called the circumzenith arc (CZA), the upside-down rainbow, and the Bravais arc, is an optical phenomenon similar in appearance...

Look up arc, arc-, or arcs in Wiktionary, the free dictionary. Arc may refer to: Arc (geometry), a segment of a differentiable curve Circular arc, a segment...

aurora australis) Belt of Venus Brocken Spectre Circumhorizontal arc Circumzenithal arc Cloud iridescence Crepuscular rays Earth's shadow Earthquake lights...

aurora australis) Belt of Venus Brocken Spectre Circumhorizontal arc Circumzenithal arc Cloud iridescence Crepuscular rays Earth's shadow Earthquake lights...

Wikimedia Commons has media related to Tangent arcs. Circumhorizontal arc Circumzenithal arc Kern arc Subsun "A magnificent halo". NOAA. 1980-12-21. Archived...

the eye's cone cells. Halo (optical phenomenon) Circumhorizontal arc Circumzenithal arc Gegenschein Zodiacal light "Definition of paraselene". Collins English...

phenomenon) Sundogs Cloud iridescence Circumzenithal arc Polar stratospheric cloud "OPOD - Moonlight Circumhorizon Arc". Tape, Walter and Moilanen, Jarmo...

Infralateral arcs occur about once a year. They are often observed together with circumscribed halos and upper tangent arcs. Circumzenithal arc Tangent arc Parry...

another geometrical object. In this way, the circumzenithal arc, the circumhorizontal arc, and the suncave Parry arcs may be recreated by refraction through...

appears at night it is called a lunar fog bow. Circumhorizontal arc Circumzenithal arc Cloud iridescence Dewbow Halo Moonbow Sun dog "Amazing white rainbow...

aurora australis) Belt of Venus Brocken Spectre Circumhorizontal arc Circumzenithal arc Cloud iridescence Crepuscular rays Earth's shadow Earthquake lights...

contrast to the related and much more common circumzenithal arc, which is only ever a partial circle. The Kern arc is named after H.F.A. Kern in the Netherlands...

supralateral arc does not form a circle and never reaches below the sun. When present, the supralateral arc touches the (much more common) circumzenithal arc from...

using, for instance, spinning crystals. Upper and lower tangent arcs Circumzenithal arc Liljequist parhelion "A magnificent halo". NOAA. 1980-12-21. Archived...

from it, meaning the circumzenithal arc is red on the bottom, while the circumhorizontal arc is red on top. The circumhorizontal arc is sometimes referred...

crystals that cause sun dogs are also responsible for the colorful circumzenithal arc, meaning that these two types of halo tend to co-occur. The latter...

breaks up into the upper tangent and lower tangent arcs. Circumzenithal arc Circumhorizontal arc Les Cowley. "Circumscribed Halo". Atmospheric Optics...

tangent arc, a 46° halo, and a circumzenithal arc. He did, however, get the upper tangent arc slightly wrong. On the other hand, he added two arcs extending...

aurora australis) Belt of Venus Brocken Spectre Circumhorizontal arc Circumzenithal arc Cloud iridescence Crepuscular rays Earth's shadow Earthquake lights...

orientations of the arcs. The supralateral arc always touches the circumzenithal arc, while the 46° halo only achieves this when the sun is located 15–27°...

unreliable as a sign of bad weather.[citation needed] 46° halo Circumzenithal arc Circumhorizontal arc Sun dog Parhelic circle Moon dog Moonbow Wikimedia Commons...

CZA may refer to: Central Zoo Authority of India circumzenithal arc, or upside-down rainbow Czapek agar, or Czapek medium, a growth medium for propagating...

with halos at 22° and 46°, and topped with an upper tangent arc and a circumzenithal arc, respectively. Of particular interest to modern scientists were...

"Supralateral & Infralateral arcs". Atmospheric Optics. Retrieved 25 February 2008. Cowley, Les. "Circumzenithal Arc". atoptics.co.uk. Atmospheric Optics...

physicist known for his work in crystallography - Bravais arc (aka the Circumzenithal arc) Pierre Savorgnan de Brazza, Italian explorer – Brazzaville...

(fluid dynamics) Circulation control wing Circumhorizontal arc Circumscribed halo Circumzenithal arc Claire F. Gmachl Clamper (electronics) Clapotis Clarence...