Who's New to Look Right Now?



A large white cap over the northern part of the country on Uraus has grown considerably since it was first seen 10 years ago.
Image: NASA, ESA, A. Simon (NASA Goddard Space Flight Center), and M.H. Wong and A. Hsu (University of California, Berkeley

Uranus may have a very bright white appearance, but as planetary scientists learn, this is the summer that looks long at the remote remote giant.

The Uranus and Neptune ice giants are full of water with hydrants, helium, and a piece of meat, and the second is the one with their outer planets a very distinctive combination of them. Unlike Earth, where seasons are only a few months, Neptune and Uraus will be able to. Get seasons that last for decades, & # 39; mean that atmosphere is rather strange.

New images have been published by the Outer Planet Atmospheres Legacy (OPAL) program which describes attractive events that showcase the " Two ice giants continue to grow, and that is an extended white cap over the northern poles of Uranus and a new dark vortex on Neptune. A project outside the Hubble program, OPAL is the annual attempt to map two planets when their orbital routes take closer to Earth. The new data, which was captured during autumn 2018, provides a very important insight into the seasonal changes on Neptune and Uranus.

"The annual ideas help us to realize how often storms are, as well as their long term," said Amy Simon, a scientist at NASA's Space Flight Center Goddard overlooking the OPAL mission, to Gizmodo. "That's important because the planets are very far from the sun, so this helps to create and provide more information about the heat and structure of these planets. # 39; most of the extrasolar planets found this size of the planet, although at any distance from their parental star. "

The large white chap is spread across the northern polar part of the Uranus, especially dramatic. The reason similar to this feature needs to be done with a distinctive planet bend, which causes sunlight to be & # 39; Expect directly on the northern policing areas for a long time during the summer. It is currently mid-summer at the northern poles of Uranus, which means the white cap is long.

"The November 2018 image of the US has happened at the time 10 years after the equinox, when the northern hemisphere just came to the sunshine of spring after its & # 39; spending decades in pole wars, "said Leighter Fletcher, a professor at Leicester University, to Gizmodo. "Back in 2007, there was nothing like this polar captain over the spring pole. But when the time was on, a white white-white white-white white-white white- blue appears to be circulated to the north pole. And now, 10 years later, that band has turned into a thick polar captain of spirits that hides it the deepest police division from the scene. "

Fletcher said that "this fantastic grandmother of a seasonal change" on this ice giant, with his "adventurous spiritual affair" coming from the spring summer. " The causes of that sky change, he said, to remain secret, with opportunities to; including heating to chemistry warming, a great quality collection pattern, or a combination of these.

"Fortunately we are not too far from responding, as James Webb Space's technique is capable of analyzing the temperature and chemistry that is dependent on the reflection changes Hubble has been doing," said Fletcher.

Peter Irwin, a planning scientist at Oxford University, said it was not a storm, as NASA explained when it was released. Instead, "it's caused to a large extent – at least in our modules – by reducing the abundance of metal over the main cloud peat with a slight increase that may be in the extreme harm, "he said to Gizmodo.

Simon thought the Iranian pole feature was expanded, but "it is more interesting for me that there is a clear storm just underneath," she said to Gizmodo. "This special storm had been scrapped and it was visible in small ground-based teilechappanes just before seeing those ideas, which show it as soon as possible. they can change. "

Neptune, with her dark shoes at her; the summit.
Image: NASA, ESA, A. Simon (NASA Goddard Space Flight Center), and M.H. Wong and A. Hsu (University of California, Berkeley

Looking at the new image of Neptune, it seems that a dark vortex again increases its ugly-even head that is interesting. The new anti-cyclonic storm, which can be seen at the top of the top elevation, is approximately 11,000km (6,800 miles). This is now the fourth dark vortex set by Hubble since 1993. Two of these storms were searched for Voyager 2 when the system was avoided in 1989. Taken together, These ideas demonstrate the wild and stormy nature of these storms. A polar vortex identified in 2016, for example, has largely disappeared.

"The dark Neptune site is far larger than those we've seen a few years ago, and it's comparatively in size to Voyager Great Dark Spot, which was seen in 1989," said Simon. "This is also the first time we would consider the department before creating such a storm, so that we can help us to create a model to create a process."

The causes of these dark places are a mystery, but because they are only seen at shortest waves, "my money has a kind of clouds," said Irwin.

Often covered by the greatest cousins, Jupiter and Saturn, these long-standing ice giants prove to be fascinating alone. We are now waiting forward to OPAL ideas next year.

[NASA]

Source link