Exploration of the gas giants

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ESA’s Jupiter Icy Moons Explorer (Juice) Gets Wings

https://scitechdaily.com/esas-jupiter-i ... ets-wings/
By European Space Agency (ESA) April 19, 2023
Juice Gets Wings

This pair of images captures the rotation of the Jupiter Icy Moons Explorer’s solar arrays during their deployment after launch on April 14. The first image was taken at 15:28 CEST during solar array panel deployment. The second image was taken at 15:32 CEST, and shows the panels having rotated into their 70 degree position, just a few seconds before the deployment sequence was confirmed to have completed. Credit: ESA/Juice/JCAM, CC BY-SA 3.0 IGO

After a successful launch on April 14 on an Ariane 5 rocket from Europe’s Spaceport in Kourou, the European Space Agency (ESA) Jupiter Icy Moons Explorer (Juice) captured this pair of images captures the rotation of the Jupiter Icy Moons Explorer’s solar arrays during their deployment

The images were taken by Juice monitoring camera 1 (JMC1), which is located on the front of the spacecraft and looks diagonally up into a field of view that will eventually see deployed antennas, and depending on their orientation, part of one of the solar arrays. Because of the acute viewing angle of the camera, only part of the array is seen, in this case p

art of the distinctive cross-shape pattern of one of the solar panels.

[weatheriscool]

Study of Uranus' large moons shows four may hold water
https://phys.org/news/2023-05-uranus-large-moons.html

by JPL/NASA

Re-analysis of data from NASA's Voyager spacecraft, along with new computer modeling, has led NASA scientists to conclude that four of Uranus' largest moons likely contain an ocean layer between their cores and icy crusts. Their study is the first to detail the evolution of the interior makeup and structure of all five large moons: Ariel, Umbriel, Titania, Oberon, and Miranda. The work suggests four of the moons hold oceans that could be dozens of miles deep.

In all, at least 27 moons circle Uranus, with the four largest ranging from Ariel, at 720 miles (1,160 kilometers) across, to Titania, which is 980 miles (1,580 kilometers) across. Scientists have long thought that Titania, given its size, would be most likely to retain internal heat, caused by radioactive decay. The other moons had previously been widely considered too small to retain the heat necessary to keep an internal ocean from freezing, especially because heating created by the gravitational pull of Uranus is only a minor source of heat.

The National Academies' 2023 Planetary Science and Astrobiology Decadal Survey prioritized exploring Uranus. In preparation for such a mission, planetary scientists are focusing on the ice giant to bolster their knowledge about the mysterious Uranus system. Published in the Journal of Geophysical Research: Planets, the new work could inform how a future mission might investigate the moons, but the paper also has implications that go beyond Uranus, said lead author Julie Castillo-Rogez of NASA's Jet Propulsion Laboratory in Southern California.

"When it comes to small bodies—dwarf planets and moons—planetary scientists previously have found evidence of oceans in several unlikely places, including the dwarf planets Ceres and Pluto, and Saturn's moon Mimas," she said. "So there are mechanisms at play that we don't fully understand. This paper investigates what those could be and how they are relevant to the many bodies in the solar system that could be rich in water but have limited internal heat."

[weatheriscool]

This is so awesome I am posting another report on it showing more information!


NASA Finds Four More Moon Oceans in the Solar System so About 20 Water Objects in the Solar System
May 10, 2023 by Brian Wang
https://www.nextbigfuture.com/2023/05/n ... stemm.html

Re-analysis of data from NASA’s Voyager spacecraft, along with new computer modeling, has led NASA scientists to conclude that four of Uranus’ largest moons likely contain an ocean layer between their cores and icy crusts. Their study is the first to detail the evolution of the interior makeup and structure of all five large moons: Ariel, Umbriel, Titania, Oberon, and Miranda. The work suggests four of the moons hold oceans that could be dozens of miles deep.

Cold surface oceans or lakes are found on two worlds, Earth and Saturn’s moon Titan. Lava lakes are found on Earth and Jupiter’s moon Io. Subsurface oceans or seas occur on the other Galilean moons of Jupiter, Saturn’s moons Titan and Enceladus, and are suspected to exist on the some of Saturn’s other moons, the asteroid Ceres, the larger trans-Neptunian objects, and ice planets in planetary systems.

[weatheriscool]

Saturn Re-takes the Moon Crown
Prof. Sam Lawler
@sundogplanets@mastodon.social
Follow

MOAR MOOOOOOONS

Saturn is up to 145 discovered moons!

https://phas.ubc.ca/saturn-re-takes-mo

[weatheriscool]

Juice’s RIME antenna breaks free
https://www.esa.int/Science_Exploration ... reaks_free

More than three weeks after efforts began to deploy Juice’s ice-penetrating Radar for Icy Moons Exploration (RIME) antenna, the 16-metre-long boom has finally escaped its mounting bracket.

During the first attempt to extend the folded-up antenna, only the first segments of each half were deployed. Flight controllers suspected that a tiny stuck pin jammed the other segments in place.

Fortunately, the flight control teams at ESA’s mission control centre in Darmstadt had lots of ideas up their sleeves.

To try to shift the pin, they shook Juice using its thrusters, then they warmed Juice with sunlight. Every day the RIME antenna was showing signs of movement, but no full release.

On 12 May RIME was finally jolted into life when the flight control team fired a mechanical device called a ‘non-explosive actuator’ (NEA), located in the jammed bracket. This delivered a shock that moved the pin by a matter of millimetres and allowed the antenna to unfold.

[Nanotechandmorefuture]

This is so awesome I am posting another report on it showing more information!


NASA Finds Four More Moon Oceans in the Solar System so About 20 Water Objects in the Solar System
May 10, 2023 by Brian Wang
https://www.nextbigfuture.com/2023/05/n ... stemm.html

Re-analysis of data from NASA’s Voyager spacecraft, along with new computer modeling, has led NASA scientists to conclude that four of Uranus’ largest moons likely contain an ocean layer between their cores and icy crusts. Their study is the first to detail the evolution of the interior makeup and structure of all five large moons: Ariel, Umbriel, Titania, Oberon, and Miranda. The work suggests four of the moons hold oceans that could be dozens of miles deep.

Cold surface oceans or lakes are found on two worlds, Earth and Saturn’s moon Titan. Lava lakes are found on Earth and Jupiter’s moon Io. Subsurface oceans or seas occur on the other Galilean moons of Jupiter, Saturn’s moons Titan and Enceladus, and are suspected to exist on the some of Saturn’s other moons, the asteroid Ceres, the larger trans-Neptunian objects, and ice planets in planetary systems.

Life on planets may be a little underground I guess? Even the bacteria would be an amazing thing to find.

[weatheriscool]

New study puts a definitive age on Saturn's rings: They're really young
https://phys.org/news/2023-05-definitiv ... young.html
by University of Colorado at Boulder

A new study led by physicist Sascha Kempf at the University of Colorado Boulder has delivered the strongest evidence yet that Saturn's rings are remarkably young—potentially answering a question that has boggled scientists for well over a century.

The research, published May 12 in the journal Science Advances, pegs the age of Saturn's rings at no more than 400 million years old. That makes the rings much younger than Saturn itself, which is about 4.5 billion years old.

"In a way, we've gotten closure on a question that started with James Clerk Maxwell," said Kempf, associate professor in the Laboratory for Atmospheric and Space Physics (LASP) at CU Boulder.

The researchers arrived at that closure by studying what might seem like an unusual subject: dust.

Kempf explained that tiny grains of rocky material wash through Earth's solar system on an almost constant basis. In some cases, this flux can leave behind a thin layer of dust on planetary bodies, including on the ice that makes up Saturn's rings.

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Scientists make first observation of a polar cyclone on Uranus
https://phys.org/news/2023-05-scientist ... ranus.html

by NASA

Scientists used ground-based telescopes to get unprecedented views, thanks to the giant planet's position in its long orbit around the sun.

For the first time, NASA scientists have strong evidence of a polar cyclone on Uranus. By examining radio waves emitted from the ice giant, they detected the phenomenon at the planet's north pole. The findings confirm a broad truth about all planets with substantial atmospheres in our solar system: Whether the planets are composed mainly of rock or gas, their atmospheres show signs of a swirling vortex at the poles.

Scientists have long known that Uranus' south pole has a swirling feature. NASA's Voyager 2 imaging of methane cloud tops there showed winds at the polar center spinning faster than over the rest of the pole. Voyager's infrared measurements observed no temperature changes, but the new findings, published in Geophysical Research Letters, do.

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James Webb telescope discovers gargantuan geyser on Saturn's moon, blasting water hundreds of miles into space

By Isobel Whitcomb published 5 minutes ago

The James Webb Space Telescope caught Saturn's icy moon Enceladus spraying a 'huge plume' of watery vapor far into space — and that plume may contain chemical ingredients for life.

Scientists caught Saturn's icy moon Enceladus spraying a "huge plume" of watery vapor far into space — and that plume likely contains many of the chemical ingredients for life.

Scientists detailed the eruption — glimpsed by the James Webb Space Telescope (JWST) in November 2022 — at a conference at the Space Telescope Science Institute in Baltimore on May 17.

"It's immense," Sara Faggi, a planetary astronomer at NASA's Goddard Space Flight Center, said at the conference, according to Nature.com. According to Faggi, a full research paper on the massive plume is pending.

This isn't the first time scientists have seen Enceladus spout water, but the new telescope's wider perspective and higher sensitivity showed that the jets of vapor shoot much farther into space than previously realized — many times deeper, in fact, than the width of Enceladus itself. (Enceladus has a diameter of about 313 miles, or 504 kilometers.)

More:
https://www.livescience.com/space/extra ... into-space

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