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Jupiter

Source: https://www.newscientist.com/article/2129805-first-results-from-jupiter-prob...

First results from Jupiter probe: "Ammonia weather, fuzzy core, huge magnetism, & storms..." #Juno

'Launched on 5 August 2011, Juno reached Jupiter and began its first orbit on 4 July last year. Since then, it has performed four more circuits. There are 33 planned pole-to-pole circuits in all, encircling the entire planet bit by bit.

The findings presented in Vienna come from these first few circuits, which each last 53 Earth days and include a 6-hour scan of the planet from north to south. Although the information is preliminary, the researchers involved are thrilled.

Much of the excitement centres on the discovery of a dense zone of ammonia gas around Jupiter’s equator, plus other regions where ammonia is depleted, which together suggest an ammonia-based weather system. We have long known that Jupiter is completely shrouded in ammonia clouds, but the existence of such a deep “belt” is surprising.

“We’ve known there’s a spike at the equator, but the new microwave data is showing that the spike goes way, way down into the abyss, 300 kilometres below the cloud,” says Leigh Fletcher of the University of Leicester, UK, who was not involved in the work. “It suggests ammonia is being distributed by a weather system that penetrates much deeper than anyone expected.”

The findings are also challenging models of what’s inside the planet. We had assumed Jupiter has a uniform interior, with a shallow “crust” of liquid hydrogen overlying a thin layer where helium rains down. Under that is a much deeper layer of metallic hydrogen, with a smaller solid core around 70,000 kilometres down. Those assumptions were based on mapping the planet’s gravity.

But initial gravity measurements from Juno challenge the idea that the internal layers inside are completely regular in their make-up. “Jupiter’s molecular envelope is not uniform,” said Tristan Guillot of the University of the Cote d’Azur in France. “We assumed we could treat the envelope as global, but now, with the finer data, it appears less regular.”

Fletcher says it points to a core that is not solid like Earth’s, but “fuzzy” and dilutely mingled with the overlying metallic hydrogen layer.'

+ Grahas (The Planets):
+ http://www.planetaryinfluence.com/articles/planets
+ http://www.sanatansociety.org/vedic_astrology_and_numerology/vedic_astrology_horoscopes_jupiter.htm
+ https://www.missionjuno.swri.edu/

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