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Thread: Juno at Jupiter

  1. #181
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    Santa flew over the North Pole of Jupiter and brought us some Christmas cheers

    https://www.geekwire.com/2018/ho-ho-...rs-north-pole/

    Santa Claus isn’t the only one bearing gifts from the north pole at this time of year. NASA’s Juno orbiter also delivered a sackful of presents over the holidays, but from the pole of a different planet: Jupiter.

    Every 53 days, the bus-sized spacecraft makes a close encounter with our solar system’s biggest planet, as part of a mission that was launched in 2011 and reached Jupiter in 2016.

    Juno’s main mission is to study Jupiter’s magnetic field and gravitational field, to give scientists a deeper understanding of the gas giant’s internal composition. But a visible-light camera called JunoCam was included on the probe, primarily to boost public outreach and education.

    The latest encounter, known as Perijove 17, occurred on Dec. 21 and went over Jupiter’s north pole. One of the scientific objectives was to take pictures of the planet’s faint aurora with Juno’s navigational camera, known as the Stellar Reference Unit.

    At the same time, JunoCam captured close-up views of Jupiter’s cloud tops, providing lots of raw imagery to keep image-processing gurus busy over the holidays.

    Here’s a sampling of pictures from Perijove 17:
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  2. #182
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    "Juno captures images of volcanic plumes on Jupiter's moon Io"

    http://www.spacedaily.com/reports/Ju...on_Io_999.html

    A team of space scientists has captured new images of a volcanic plume on Jupiter's moon Io during the Juno mission's 17th flyby of the gas giant. On Dec. 21, during winter solstice, four of Juno's cameras captured images of the Jovian moon Io, the most volcanic body in our solar system.

    JunoCam, the Stellar Reference Unit (SRU), the Jovian Infrared Auroral Mapper (JIRAM) and the Ultraviolet Imaging Spectrograph (UVS) observed Io for over an hour, providing a glimpse of the moon's polar regions as well as evidence of an active eruption.

    "We knew we were breaking new ground with a multi-spectral campaign to view Io's polar region, but no one expected we would get so lucky as to see an active volcanic plume shooting material off the moon's surface," said Scott Bolton, principal investigator of the Juno mission and an associate vice president of Southwest Research Institute's Space Science and Engineering Division.
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  3. #183
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    Juno captures two massive storms in Jupiter.

    http://www.spacedaily.com/reports/Ju...torms_999.html

    This image of Jupiter's turbulent southern hemisphere was captured by NASA's Juno spacecraft as it performed its most recent close flyby of the gas giant planet on Dec. 21, 2018.

    This new perspective captures the notable Great Red Spot, as well as a massive storm called Oval BA. The storm reached its current size when three smaller spots collided and merged in the year 2000. The Great Red Spot, which is about twice as wide as Oval BA, may have formed from the same process centuries ago.

    Juno captured Oval BA in another image earlier on in the mission on Feb. 7, 2018. The turbulent regions around, and even the shape of, the storm have significantly changed since then. Oval BA further transformed in recent months, changing color from reddish to a more uniform white.
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  4. #184
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    I wonder whether these two storms are close enough to merge also?

  5. #185
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    Juno has discovered another scientific fact about Jupiter magnetic field.

    https://www.jpl.nasa.gov/news/news.php?feature=7406

    NASA's Juno mission to Jupiter made the first definitive detection beyond our world of an internal magnetic field that changes over time, a phenomenon called secular variation. Juno determined the gas giant's secular variation is most likely driven by the planet's deep atmospheric winds.

    The discovery will help scientists further understand Jupiter's interior structure - including atmospheric dynamics - as well as changes in Earth's magnetic field. A paper on the discovery was published today in the journal Nature Astronomy.

    "Secular variation has been on the wish list of planetary scientists for decades," said Scott Bolton, Juno principal investigator from the Southwest Research Institute in San Antonio. "This discovery could only take place due to Juno's extremely accurate science instruments and the unique nature of Juno's orbit, which carries it low over the planet as it travels from pole to pole."
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  6. #186
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    "NASA’s Juno spacecraft sees moon’s otherworldly shadow on Jupiter"

    https://spaceflightnow.com/2019/09/1...ow-on-jupiter/

    Fresh images from NASA’s Juno spacecraft show an ethereal shadow cast by Jupiter’s volcanic moon Io on the planet’s swirling cloud tops.

    The JunoCam imager captured views of Io’s distinct shadow on Jupiter during its most recent passage near the giant planet, and skilled amateur image analysts immediately set to work processing the data into dazzling renderings showing a black circle amid Jupiter’s churning clouds.

    Juno spotted the eclipse during a Sept. 12 encounter near Jupiter, the 22nd such flyby since arriving in orbit around the solar system’s largest planet on July 4, 2016. The spacecraft carries instruments to study Jupiter’s internal structure and weather, along with sensors to measure and map the planet’s strong magnetic field and gravity.
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  7. #187
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    "NASA's Juno navigators enable Jupiter cyclone discovery"

    http://www.spacedaily.com/reports/NA...overy_999.html

    Jupiter's south pole has a new cyclone. The discovery of the massive Jovian tempest occurred on Nov. 3, 2019, during the most recent data-gathering flyby of Jupiter by NASA's Juno spacecraft. It was the 22nd flyby during which the solar-powered spacecraft collected science data on the gas giant, soaring only 2,175 miles (3,500 kilometers) above its cloud tops. The flyby also marked a victory for the mission team, whose innovative measures kept the solar-powered spacecraft clear of what could have been a mission-ending eclipse.

    "The combination of creativity and analytical thinking has once again paid off big time for NASA," said Scott Bolton, Juno principal investigator from the Southwest Research Institute in San Antonio. "We realized that the orbit was going to carry Juno into Jupiter's shadow, which could have grave consequences because we're solar powered.
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  8. #188
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    "Stunning Images Of A ‘Churning’ Jupiter Emerge After NASA Spacecraft’s Close Shave Last Week"

    https://www.forbes.com/sites/jamieca.../#573244335647

    NASA’s first solar powered spacecraft at Jupiter has sent back some stunning images of the giant planet after last week’s latest flyby.

    One image in particular (above) shows the complexity in the planet’s cloud tops. It was processed by citizen scientist Kevin M. Gill, one of several who are working on raw image data sent back to Earth since last week’s flyby.

    Taken when Juno was 5,375 miles above Jupiter and traveling at 127,000 mph, according to NASA the image shows “relatively small, bright, “pop-up” clouds — which rise above the surrounding features — stand out at the tops and edges of the swirling patterns, while the darker areas nearby reveal greater depth.”
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  9. #189
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    Quote Originally Posted by selvaarchi View Post
    "Stunning Images Of A ‘Churning’ Jupiter Emerge After NASA Spacecraft’s Close Shave Last Week"

    https://www.forbes.com/sites/jamieca.../#573244335647
    Wow. Just... wow. That is the most amazing stuff. This isn't the Jupiter of my childhood, the little fuzzy pictures with dull belts.
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  10. #190
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    Quote Originally Posted by Roger E. Moore View Post
    Wow. Just... wow. That is the most amazing stuff. This isn't the Jupiter of my childhood, the little fuzzy pictures with dull belts.
    That's true but we didn't have good views of the polar areas from Earth either.

  11. #191
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    Still haven't released any data about Jupiter's core though have they? Which is odd because that is what the mission is, you know, about?

    Sorry for being snarky but I have a Wikipedia page that's been waiting for the results for fifteen years.
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

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  12. #192
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    Quote Originally Posted by parallaxicality View Post
    Still haven't released any data about Jupiter's core though have they? Which is odd because that is what the mission is, you know, about?

    Sorry for being snarky but I have a Wikipedia page that's been waiting for the results for fifteen years.
    Yes I seem to remember that was part of the mission objectives. Perhaps the failure to reduce the apojun(?) has retarded that study.

  13. #193
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    "Ammonia sparks unexpected, exotic lightning on Jupiter"

    https://www.spacedaily.com/reports/A...piter_999.html

    NASA's Juno spacecraft - orbiting and closely observing the planet Jupiter - has unexpectedly discovered lightning in the planet's upper atmosphere, according to a multi-institutional study led by the NASA/Jet Propulsion Laboratory (JPL), which includes two Cornell University researchers.

    The work was published Aug. 5 in the journal Nature.

    Jupiter's gaseous atmosphere seems placid from a distance, but up close the clouds roil in a turbulent, chemically dynamic realm. As scientists have probed the opaque surface with Juno's sensitive instrumentation, they've learned that Jupiter's lightning occurs not only deep within the water clouds but also in shallow atmospheric regions (at high altitudes with lower pressure) that feature clouds of ammonia mixed with water.
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  14. #194
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    I would prefer “thunderhead” to “mushball.”

  15. #195
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    Quote Originally Posted by parallaxicality View Post
    Hm. I had a bet with one of the Juno scientists that Jupiter had no core; he disagreed on the principle that if Jupiter had no core than everything we thought we knew about solar system formation was wrong. Well if you're going to think like that...

    Anyhoo, at least I don't have to completely rewrite every Solar System Wikipedia article...
    Would you settle for metallic hydrogen for the core - "Researchers have used a combination of AI and quantum mechanics to reveal how hydrogen gradually turns into a metal in giant planets."

    https://www.cam.ac.uk/research/news/...-giant-planets

    Dense metallic hydrogen – a phase of hydrogen which behaves like an electrical conductor – makes up the interior of giant planets, but it is difficult to study and poorly understood. By combining artificial intelligence and quantum mechanics, researchers have found how hydrogen becomes a metal under the extreme pressure conditions of these planets.

    The researchers, from the University of Cambridge, IBM Research and EPFL, used machine learning to mimic the interactions between hydrogen atoms in order to overcome the size and timescale limitations of even the most powerful supercomputers. They found that instead of happening as a sudden, or first-order, transition, the hydrogen changes in a smooth and gradual way. The results are reported in the journal Nature.
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  16. #196
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    Well yeah but we always knew metallic hydrogen was in Jupiter. The question is what's under it.
    "Occam" is the name of the alien race that will enslave us all eventually. And they've got razors for hands. I don't know if that's true but it seems like the simplest answer."

    Stephen Colbert.

  17. #197
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    "NASA’s Juno spacecraft seeking extended mission at Jupiter"

    https://spacenews.com/nasas-juno-spa...on-at-jupiter/

    NASA’s Juno mission orbiting Jupiter is seeking a long-term extension that would allow the spacecraft to carry out new studies of the planet and some of its largest moons.

    Juno, part of the New Frontiers class of medium-sized planetary science spacecraft, is finalizing a proposal for an extended mission that would keep the spacecraft operating through September 2025, said Scott Bolton, principal investigator for Juno, at a Sept. 2 meeting of the Outer Planets Assessment Group online.
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  18. #198
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    Yet another article on Juno mission - "Juno and the case of Jupiter’s missing ammonia" It also contains a video on the new results from Juno.

    https://www.nasaspaceflight.com/2020...ssing-ammonia/

    NASA’s Juno spacecraft, the agency’s flagship mission to Jupiter, continues to stream back an incredible amount of scientific data about the largest planet in our solar system just over four years after arriving in orbit.

    Some of the most recent discoveries pertain to lightning in Jupiter’s upper atmosphere, called “shallow lightning,” as well as indications of ammonia laden hail, which has helped scientists explain the ammonia loss in Jupiter’s upper atmosphere that has puzzled them for some time.
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