NASA explains the mysterious holes in the sky. NASA has published images of the spectacular holes in the sky, which have amazed millions of people since in 2014 a singular phenomenon was appreciated in Australia.
In November 2014, residents of Wonthaggi, a city 132 kilometers southeast of Melbourne, home to about 5,000 people, photographed a strange cloud that appeared to be perforated. It was also observed in another city even closer to Melbourne, called Korumburra.
Those images went around the world through social networks and, seven years later, NASA has brought up this phenomenon with new images of perforated clouds: some taken in Sweden in 2020, and others taken west of Atlanta in Georgia. , at the beginning of this year. There are more testimonies in other parts of the world.
They are surprising images, although they do not represent any scientific mystery.
Certain conditions NASA explains in this regard that this phenomenon is known as Fallstreak Holes or as hole-punch clouds : it occurs when certain conditions are met: cold temperatures and atmospheric instabilities.
The phenomenon occurs in medium-level clouds composed of liquid water droplets that are super cooled: they remain in a liquid state, even when temperatures are below the typical freezing point of water (0 ° C).
However, a plane passing through the cloud can cause those super cold water droplets to freeze and cause a cascade of freezes that spawns ice crystals.
Near airports When they get heavy enough, these ice crystals break off the clouds and fall, leaving a hole in the sky, a void in the cloud layer.
Both ascending and descending airplanes are a common trigger for gaps in the clouds, so they are relatively appreciated near busy airport runways.