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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 Two sun dogs often flank the Sun within a 22° halo
  • 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
  • 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
  • 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
  • Sun dog | Definition Facts | Britannica
    Sun dogs occur when the Sun or Moon shines through a thin cirrus cloud composed of hexagonal ice crystals falling with their principal axes vertical, as opposed to the halo phenomenon that occurs when the principal axes are randomly arranged in a plane perpendicular to the Sun’s or Moon’s rays
  • Sun Dogs: What Are They And How Are They Formed? - Science ABC
    A sun dog is an optical atmospheric phenomenon that causes bright spots at an angle of 22 degrees on one or both sides of the sun 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 Sun dogs?
  • Sun dogs in the skies: What is a parhelion? - al. com
    Many noticed a rainbow-like ring partially encircling the sun It’s a phenomenon called a parhelion, and it’s not all that uncommon, according to the National Weather Service A parhelion is the
  • What Are Sun Dogs and How Are They Caused? - Astronomy Trek
    Sundogs (‘parhelion’ or plural ‘parhelia’) are members of a larger family of atmospheric phenomena known as halos Sundogs in particular are formed when sunlight is refracted in the horizontal plane through six-sided, plate-like ice crystals that float in the atmosphere, or are suspended in high and cold cirrus or cirrostratus clouds
  • Parhelion - definition of parhelion by The Free Dictionary
    parhelion - a bright spot on the parhelic circle; caused by diffraction by ice crystals; "two or more parhelia are usually seen at once"
  • PARHELION | English meaning - Cambridge Dictionary
    PARHELION definition: 1 a bright spot that appears in the sky on either side of the sun, caused by the refraction… Learn more





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