The space agency also spotted a new storm brewing on Neptune.
"These images are part of a scrapbook of Hubble snapshots of Neptune and Uranus that track the weather patterns over time on these distant, cold planets", NASA said.
Voyager 2, for example, has observed two massive storms forming up on Neptune in 1989, while NASA's Hubble Space Telescope, which is has been following Neptune from time to time since 1993, also spotted three such hurricanes similar to the recently observed mysterious dark vortex on Neptune.
According to NASA, the "mysterious dark vortex" is a storm that is a result of the ice giant's southern summer.
The large white cap strewn over the north pole of Uranus is particularly dramatic.
However, even though these massive storms are not rare on Neptune, NASA has no clue why and how these dark vortices form in the methane-rich atmosphere of the fourth-largest planet in our solar system. Scientists think this near constant exposure of the northern pole creates atmospheric conditions ripe for enormous polar storms like the one Hubble captured in November 2018. They are similar to clouds that appear as pancake-shaped features when air is pushed over mountains on Earth. The cap, which may form due to seasonal changes in atmospheric flow, has become much more prominent than in previous observations dating back to the flyby of NASA's Voyager 2 spacecraft, when the planet, in the throes of winter, looked bland. That hemisphere is now sporting a massive dark storm that stretches about 6,800 miles (11,000 kilometers) across.
The causes of these dark spots is a mystery, but because they're only seen at the bluest wavelengths, "my money is on some sort of coloration of the clouds", said Irwin.
Like Jupiter's Great Red Spot, the dark vortices swirl in an anti-cyclonic direction and seem to dredge up material from deeper levels in the ice giant's atmosphere. "Unlike every other planet in the solar system", NASA explained.
This image, taken by Hubble's Wide Field Camera 3 (WFC3), reveals a vast bright stormy cloud cap across the north pole of Uranus.
"Scientists believe this new feature is a result of Uranus' unique rotation". Whereas Earth's worst storms typically last no more than days or weeks, Neptune's newest dark vortex is expected to last years.
'Because of this extreme tilt, during the planet's summer the Sun shines nearly directly onto the north pole and never sets. But as time progressed, a reflective band-whitish against Uranus' blue hues-began to appear encircling the north pole.
At the edge of the storm is a compact methane-ice cloud.
Syriza has 145 seats in parliament but has support from a number of independents, allowing it to muster a majority in voting. One lawmaker described the pact as "worth spitting at", another that Greece was "humiliated".
The Blast also reports that an additional $150,000 was wired to Burundi Partlow Consulting, which is a Chicago-based company. He says the Plein and himself agreed on a "t-shirt" shortly after recanting on their "concert" agreement.
Around 47,488 tons of old devices had been collected by October past year , with more than 5m mobile phones handed over. The recycled metal has been collected from the Japanese public as well as businesses and industry.
Punke stressed the benefits of facial-recognitions systems, like finding missing children and identifying suspects in crimes. In India, Duggal said, anybody can misuse this technology without fears of facing any adverse legal consequences.
Google has already patched the security issue and the patches were pushed to the Android Open Source Project (AOSP) repository. So you won't be protected until your Android handset receives the 2019 February update.
The majority of Finnish political parties in the current parliament do not support basic income as defined for the test. It took a different tack previous year , however, by imposing benefits sanctions on unemployed people who refused work.
The game was the last in a rivalry week for Boston and Los Angeles that began when the Patriots beat the Rams in the Super Bowl . Beasley, 30, was acquired in Thursday's trade with the Los Angeles Lakers for center Mike Muscala .
He signed a one-year, $10.5 million deal with Cleveland in January, and will be arbitration eligible in both 2020 and 2021. The Indians said Lindor was evaluated Wednesday at the Cleveland Clinic , where a doctor confirmed a moderate calf strain.
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