by APOD Robot » Fri Sep 14, 2018 4:15 am
Ice Halos at Yellowknife
Explanation: You've probably seen a circle
around the Sun before. More common than rainbows, ice halos, like a 22 degree circular halo for example, can be easy to spot, especially if you can shade your eyes from direct sunlight. Still it's rare to see such a diverse
range of ice halos, including
sundogs, tangent, infralateral, and Parry arcs,
all found in this snapshot from planet Earth. The picture was quickly taken in the late morning of September 4 from Yellowknife, Northwest Territories, Canada. The beautiful patterns are generated as sunlight
(or moonlight) is reflected and refracted in six-sided water ice crystals in Earth's atmosphere. Of course, atmospheric ice halos in the skies of
other worlds are likely
to be different.
[url=https://apod.nasa.gov/apod/ap180914.html] [img]https://apod.nasa.gov/apod/calendar/S_180914.jpg[/img] [size=150]Ice Halos at Yellowknife[/size][/url]
[b] Explanation: [/b] [url=https://science.nasa.gov/science-news/science-at-nasa/2002/24oct_sunrings]You've probably seen[/url] a circle [url=https://apod.nasa.gov/apod/ap180101.html]around the Sun before[/url]. More common than rainbows, ice halos, like a 22 degree circular halo for example, can be easy to spot, especially if you can shade your eyes from direct sunlight. Still it's rare to see such a diverse [url=https://www.atoptics.co.uk/halosim.htm]range of ice halos[/url], including [url=https://science.nasa.gov/science-news/science-at-nasa/2011/11feb_sundogmystery]sundogs[/url], tangent, infralateral, and Parry arcs, [url=https://apod.nasa.gov/apod/image/1809/image2bedingfield1024.jpg]all found in this snapshot[/url] from planet Earth. The picture was quickly taken in the late morning of September 4 from Yellowknife, Northwest Territories, Canada. The beautiful patterns are generated as sunlight [url=https://apod.nasa.gov/apod/ap150403.html](or moonlight)[/url] is reflected and refracted in six-sided water ice crystals in Earth's atmosphere. Of course, atmospheric ice halos in the skies of [url=https://www.jpl.nasa.gov/news/news.php?feature=7140]other worlds[/url] are likely [url=https://www.atoptics.co.uk/halo/oworld.htm]to be different[/url].
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