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parhelion    
n. 幻日

幻日

parhelion
n 1: a bright spot on the parhelic circle; caused by diffraction
by ice crystals; "two or more parhelia are usually seen at
once" [synonym: {parhelion}, {mock sun}, {sundog}]


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  • Sun dog - Wikipedia
    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
  • What Is a Sun Dog? - Science Notes and Projects
    In meteorology, a sun dog or parhelion is a bright spot on one or both sides of the Sun Sun dogs or parhelia are around around 22° directly to the left and right of the Sun, sometimes accompanied by a 22° halo around the Sun
  • All About Sundogs - Rainbows beside the Sun! | The Old Farmers Almanac
    The short answer: A sun dog, or parhelion, is a bright patch of light—often rainbow-colored—that appears beside the Sun when sunlight refracts through ice crystals in high clouds
  • Sun dog | Definition Facts | Britannica
    Less frequently observed phenomena, such as parhelia, sun pillars, tangent arcs, sun crosses, and others, also are attributable to the reflection or refraction of sunlight or moonlight by ice crystals This article was most recently revised and updated by Amy Tikkanen Corrections? Updates? Omissions?
  • What Is A Sundog - Defining A Parhelion And How It Occurs
    A sundog or parhelion is defined as a bright optical phenomenon occurring near the horizon on the left, right, or both sides of the sun at a 22-degree radius It is a result of sunlight refracted by hexagon-shaped ice crystals in Cirrus clouds with their primary axis vertically orientated
  • What Is A Sun Dog ? How Sun Dogs Are Formed In The Sky?
    It is also called a mock sun or parhelion in meteorology Sun dogs occur as a result of the refraction or scattering of light from flat hexagonal-shaped ice crystals that are suspended in clouds
  • Parhelion - SKYbrary Aviation Safety
    A parhelion (plural parhelia), also commonly known as sun dog or mock sun, is an atmospheric optical phenomenon that consists of a bright spot to one or both sides of the Sun
  • PARHELION Definition Meaning - Merriam-Webster
    The meaning of PARHELION is any of several bright spots often tinged with color that often appear on the parhelic circle on either side of the sun—called also sun dog
  • Parhelion - definition of parhelion by The Free Dictionary
    Define parhelion parhelion synonyms, parhelion pronunciation, parhelion translation, English dictionary definition of parhelion n pl par·he·li·a A bright spot sometimes appearing at either side of the sun, often on a luminous ring or halo, caused by the refraction and reflection of
  • Parhelion - Sun Dog - Atmospheric Optics
    A parhelion (plural parhelia), or sun dog is a bright patch of light occurring on or near the 22° halo on the right and or left of the Sun caused by the refraction of the sunlight by plate-like hexagonal ice crystals in the atmosphere





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