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sundog    
幻日

幻日

sundog
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, parallel to the horizon
  • Rainbows beside the Sun! - The Old Farmers Almanac
    Sun dogs appear when sunlight passes through a thin veil of ice crystal clouds (usually cirrus or cirrostratus), and the ice acts as a prism, refracting the light A sun dog is seen about 22° to the left or right of the Sun Sun dogs often form in pairs on either side of the Sun
  • What are sundogs and how do they form? - Space. com
    A sundog is a concentrated patch of sunlight that is occasionally seen to the right or the left of the sun or even on both sides of our star in the sky simultaneously
  • What Causes Halos, Sundogs and Sun Pillars?
    Sundogs are colored spots of light that develop due to the refraction of light through ice crystals They are located approximately 22 degrees either left, right, or both, from the sun, depending on where the ice crystals are present The colors usually go from red closest to the sun, out to blue on the outside of the sundog
  • Sun Dogs and Sun Halos Explained: Meaning Weather Lore
    Is there a little piece of rainbow hanging in the sky next to the Sun? How about a strange circle of light around it? You may be seeing a Sun dog (sundog) or Sun halo Learn what causes these sunny sensations and what they may say about the weather coming your way
  • 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 Do Sundogs Mean? The Science and Folklore
    What Exactly is a Sundog? A sundog is an atmospheric optical phenomenon known scientifically as a parhelion, meaning “beside the sun ” It manifests as a bright, concentrated patch of light, often displaying subtle rainbow coloring, on one or both sides of the sun
  • What is a Sundog, and How Did Sundogs Get Their Name?
    As with sundogs, hexagonal ice crystals suspended in cirrostratus clouds refract sunlight to create the halo, sometimes also called an icebow, nimbus, or gloriole Unlike sundogs, which generally only be seen when the Sun is near the horizon, the halo is visible even when the Sun is high
  • What is a sundog? Stunning phenomenon seen in Chicago area – NBC Chicago
    What is a sundog? According to the National Weather Service, "sundogs are colored spots of light that develop due to the refraction of light through ice crystals "
  • What Is A Sundog? - WorldAtlas
    Sundogs are patches of light that are colorful and appear to be bright on either or both sides of the sun They are approximately 22 degrees on either or both sides of the sun Sundogs cover the same distance as the sun above the horizon Sometimes they are seen as part of a ring surrounding the sun





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