Thursday , July 29 2021

Uranus now looks completely crazy



Uranus now looks completely crazy
Credit: NASA, ESA, A. Simon (NASA Goddard Space Flight Center) and M.H. Wong and A. Hsu (University of California, Berkeley)

It seems that the presence of a huge white cap on Uranus is disturbed, even though planetary scientists are learning, this is what looks like a exhausted summer at a remote ice giant.

The glacial giants Uranus and Neptune have a rich interior in the water that is covered with hydrogen, helium and methane, and the last of these outer planets gives a special Cyan polt. Unlike Earth, where the seasons are only a few months away, Neptune and Uranus experience seasonal seasons that last for a very long time, which brings strange and intense atmospheric phenomena.

Recently, the Olympic Heritage Program (OPAL) published new paintings that highlight the evolving atmospheric event on both ice giants, an extended white hat above the Uranus' North Pole and a new dark whirl of Neptune. New data captured in the autumn of 2018 provide important new insights into the seasonal differences on Neptune and Uranus.

Especially dramatic is the large white hat, scattered above the Uranus' North Pole. The likely cause for this function is the unique inclination of the planet, which makes the sunlight direct in the northern polar region in the summer. It is currently in the middle of summer in the northern half of Uranus, which makes it a long white cap.

Amy Simon, a NASA Center Goddard Space Flight Center scientist who heads the OPAL mission, told Gizmod: "Annual observations help us understand the frequency of storms and their longevity. This is important because these planets are quite far from the Sun, so this will help to limit their design and more about the inner heat and structure of these planets. Most of the discovered extrasolar planets are of such a size of the planet, although at all distances from their parent stars.

Leigh Fletcher, an astronomer from the University of Leicester, said: "The image of Uranus from November 2018 appears over a period of 10 years after equinox, when the northern hemisphere only after decades of polar winter came into the spring sunlight. In 2007, it seems that there is nothing like this polar cap over the spring pole. But over time, the reflective belt began to appear – a whitish blaze against Uran's blue shade, which surrounded the northern hemisphere. And now, 10 years later, this dog has turned into a thick polar cap of aerosols that hide the deeper polar region.

"This is a spectacular example of seasonal changes in this ice giant, with the aerosol cap developing as the spring becomes a summer. The precise causes of these changes in aerosols, he said, remain a mystery, with options that include warming temperatures, unusual chemistry, some great patterns of atmospheric circulation, or a combination of all these.

"Fortunately, we are not far from the answer, because the space telescope James Webb will be able to diagnose the temperature and chemistry that are responsible for these changes in the reflexes that were accompanied by Hubble."

Patrick Irwin, a planetary scientist at the University of Oxford, said that this phenomenon was not a storm, as NASA described in its release. On the contrary, this is primarily – at least in our models – is due to a decrease in the methane abundance above the main deck of the cloud, accompanied by a possible slight increase in opacity of the mist.

Simon said: "The expanded uranium polar function was cool, but the light storm just beneath it is more interesting to me. This particular storm erupted and was visible in small earth masts just before these observations, which show how quickly they can change. «

Observing the image of Neptune gives the idea that the dark whirlwind again has raised its nasty but attractive head. The new anti-cyclone bora, which can be seen at the best spot on the above photo, is about 11,000 kilometers.

Simon said: "The dark point of Neptune is much larger than the one we saw a few years ago and is comparable in size to the Great Voyager Voyager 1989. That's also the first time that we could see the area before the storm. size, which will help us in shaping the design process. "


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