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Jupiter’s Great Red Spot grows taller: NASA

Jupiter's Great Red Spot, which has been shrinking for a century and a half, seems to be growing taller as it gets smaller

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NASA, Pixabay
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Jupiter’s Great Red Spot, which has been shrinking for a century and a half, seems to be growing taller as it gets smaller, NASA scientists have found.

The Great Red Spot is a persistent high-pressure region in the atmosphere of Jupiter, producing an anti-cyclonic storm 22 degree south of the planet’s equator.

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Jupiter’s red spot is becoming longer. Pixabay.

The findings, published in the Astronomical Journal, indicate that the Great Red Spot recently started to drift westward faster than before. Historically, it’s been assumed that this drift is more or less constant.

The study confirms that the storm has been decreasing in length overall since 1878 and is big enough to accommodate just over one Earth at this point. But the historical record indicates the area of the spot grew temporarily in the 1920s.

“Storms are dynamic, and that’s what we see with the Great Red Spot. It’s constantly changing in size and shape, and its winds shift, as well,” said Amy Simon, an expert in planetary atmospheres at NASA’s Goddard Space Flight Centre in Maryland.

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“There is evidence in the archived observations that the Great Red Spot has grown and shrunk over time,” added Reta Beebe, Professor at New Mexico State University in Las Cruces. “However, the storm is quite small now, and it’s been a long time since it last grew,” Beebe said.

Because the storm has been contracting, the researchers expected to find the already-powerful internal winds becoming even stronger. However, instead of spinning faster, the storm appears to be forced to stretch up. The change in height is small relative to the area that the storm covers, but it’s still noticeable.

Further, the Great Red Spot’s colour is also deepening, becoming intensely orange since 2014, the researchers observed. While the researchers are not sure why that’s happening, it’s possible that the chemicals which colour the storm are being carried higher into the atmosphere as the spot stretches up.

Jupiter’s red spot is decreasing in width. NASA

At higher altitudes, the chemicals would be subjected to more UltraViolet radiation and would take on a deeper colour. Once big enough to swallow three Earths with room to spare, the mystery surrounding Great Red Spot seems to deepen as the iconic storm contracts.

Researchers do not know whether the spot will shrink a bit more and then stabilise, or break apart completely. “If the trends we see in the Great Red Spot continue, the next five to 10 years could be very interesting from a dynamical point of view,” the researchers said.

“We could see rapid changes in the storm’s physical appearance and behaviour, and maybe the red spot will end up being not so great after all,” they added. IANS

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US Senators Want NASA To Extend The ISS Life Until At Least 2028

The aim was to save mony so that more resources could invested into deep space exploration of the Moon and eventually Mars.

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NASA ISS
Representational Image, VOA

NASA should extend the life of the International Space Station (ISS) until at least 2028, two US Senators said in a hearing to examine the future of the orbiting laboratory.

Senator Ted Cruz of Texas who is the Chairman of the Subcommittee on Space, Science, and Competitiveness convened the hearing on Wednesday, which was the first in a series of two hearings to examine the role of the space station.

In its 2019 budget request, the Donald Trump administration proposed ending direct government funding for the ISS by 2025, Florida Today, part of the USA Today network, reported on Wednesday.

“We’ve got this platform up there (worth) north of $100 billion, and it’s there,” Senator Bill Nelson of Florida, ranking member on the Subcommittee on Space, Science and Competitiveness, was quoted as saying.

“Abandoning this incredible orbiting laboratory where they are doing research, when we are on the cusp of a new era of space exploration, would be irresponsible at best and probably disastrous,” Nelson added.

NASA should extend the life of the International Space Station (ISS) until at least 2028, two US Senators said in a hearing to examine the future of the orbiting laboratory.
ISS is a permanent base for astronauts stationed in the outer sky. Wikimedia Commons

The NASA Transition Authorization Act of 2017 directed NASA to develop a plan to transition ISS from the current regime that relies heavily on NASA sponsorship to a regime where NASA could be one of many customers of a low-Earth orbit (LEO) non-governmental human space flight enterprise.

The aim was to save mony so that more resources could invested into deep space exploration of the Moon and eventually Mars.

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The space agency’s internal watchdog on Wednesday, however, said that private companies are unlikely to take on the more than $1 billion annual cost to run the International Space Station by 2025 as NASA hopes.

The report from NASA Inspector General provided a closing argument against the Trump administration’s proposal to privatise or abandon the orbiting laboratory so soon, the US senators said, according to the Florida Today report.

“The defence rests,” quipped Senator Cruz of Texas. (IANS)