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NASA’s Juno spacecraft strips Jupiter down to its underwear

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The interior of Jupiter is just as intriguing as the planet’s dazzling surface, with a swirling mixture of liquid hydrogen and helium at its center, vast atmospheric jet streams and exotic gravitational properties, scientists said on Wednesday.

Data from NASA’s Juno spacecraft, orbiting the solar system’s largest planet since 2016, is providing researchers with what they called unprecedented insight into Jupiter’s internal dynamics and structure. Until now, scientists have had scant information about what lies below Jupiter’s thick red, brown, yellow and white clouds.

“Juno is designed to look beneath these clouds,” said planetary science professor Yohai Kaspi of the Weizmann Institute of Science in Israel, who led part of the research using Juno’s new measurements of Jupiter’s gravity.

“On Jupiter, a gaseous planet without a solid surface, we can only gather information from orbit,” added aerospace engineering professor Luciano Iess of Sapienza University of Rome, who also led part of the research.

Jupiter is a type of planet called a gas giant, as opposed to rocky planets like Earth and Mars, and its composition is 99 percent hydrogen and helium. Juno’s data showed that as you go deeper under the surface, Jupiter’s gas becomes ionized and eventually turns into a hot, dense metallic liquid.

The scientists said Jupiter’s jet streams, related to the familiar stripes on its surface, plunge some 1,800 miles (3,000 km) below cloud level, and that its deep interior is comprised of a fluid hydrogen and helium mixture that rotates as if it were a solid body.

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“The very center may contain a core made of high-pressure and high-temperature rocks and perhaps water, but it is believed to be fluid as well, not solid,” said planetary scientist Tristan Guillot of the Université Côte d’Azur in Nice, another of the research leaders.

Juno’s data showed a small but significant asymmetry between the gravitational field of Jupiter’s northern and southern hemispheres, driven by the immense jet streams. The deeper the jets streams go, the more mass they contain, exerting a strong effect on Jupiter’s gravitational field, Kaspi said.

 
Jupiter, the fifth planet from the sun, dwarfs the solar system’s other planets, measuring about 89,000 miles (143,000 km) in diameter at its equator, compared with Earth’s diameter of about 8,000 miles (12,750 km). It is big enough that 1,300 Earths could fit inside it.

The research was published in the journal Nature.

Reporting by Will Dunham; Editing by Jonathan Oatis

Report typos and corrections to [email protected].
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Virginia Democrats are so fired up that the party chair had to scold them: ‘Sit down — be quit’

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Democrats in Virginia are fired up as they gathered in Richmond for their annual gala dinner.

Political analysts believe the Democratic Party of Virginia has a good chance to win control of the state legislature in 2019's election, before setting their sights on the Commonwealth continuing its recent trend of voting Democratic in presidential elections.

Patrick Wilson, a political reporter for the Richmond Times-Dispatch, attended the event.

He reported that Democrats were so "noisy" that it was hard to hear the speakers, which include presidential candidates Sen. Amy Klobuchar (D-MN) and South Bend Mayor Pete Buttigieg.

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‘Everyone knows what to expect’ at Trump’s Amway Center re-election kickoff

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Donald Trump considers himself a legendary salesman, but can he really sell America on giving him four more drama-filled years at the White House?

Tuesday, he'll make his big pitch.

The 2020 reelection kickoff rally is being held in Orlando, Florida and campaign operations chief Michael Glassner says the "historic" event "has already generated tens of thousands of ticketing requests."

There's little mystery about how the night will go down.

Expect Trump, the self-promoting hero of his ghost-written book "The Art of the Deal," to claim the US economy is richer, the military stronger, and the country more respected than ever in history.

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Florida man’s own family blasts him after he was arrested for racist threats: ‘This isn’t how we were raised’

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After a Florida man was arrested for trying to start a race war, a member of his own family slammed his values.

"A Florida man’s social media posts that threatened violence against African-Americans, Jews and homosexuals and that urged his followers to start a race war netted him a $1 million bond," the Miami Herald reported Saturday. "And then there’s another $100,000 bond he would have to pay to get out of Lee County Jail because of a weapons charge."

Joshua Leff, 40, is being held in the Lee County Jail.

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