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Ganymede

All articles tagged with #ganymede

space23 days ago•14 min saved

Ganymede: a moon the size of a planet with its own magnetic field

Ganymede, Jupiter’s largest moon, is about the same diameter as Mercury but far less massive, thanks to its rock-and-ice composition; it likely harbors more water than Earth’s surface, has a layered interior with an iron-rich core and a conductive ocean, and uniquely generates its own magnetic field, creating a small magnetosphere within Jupiter’s. The moon’s complex geology, thin atmosphere, and tidal interactions mean it is a world in its own right, not just a simple satellite, and the upcoming JUICE mission aims to orbit Ganymede in 2034 to study its ice shell, ocean, and dynamo.

via Space Daily|

#ganymede #jupiter #magnetosphere

science-space1 month ago•10 min saved

Titan Wider Than Mercury, Second‑Largest Moon After Ganymede

Saturn’s moon Titan, about 5,150 km across, is wider than Mercury and is the Solar System’s second-biggest moon after Jupiter’s Ganymede, though its mass is only about 40% of Mercury’s due to its icy composition. Titan also boasts a thick nitrogen atmosphere and stable surface liquids (methane/ethane) with Earth-like features such as rivers and lakes, highlighting how size and nature can diverge: a world that looks planet-like but remains a moon. The distinction is orbital, not dimensional, and missions like Cassini–Huygens and the future Dragonfly continue to study Titan’s unique geology and weather.

via Space Daily|

#atmosphere #ganymede #mercury

space-and-spaceflight3 months ago•17 min saved

Ganymede’s Forming Core Sparks a New Dynamo Theory

A Science Advances study suggests Ganymede’s metallic core is still forming today, and that ongoing convection in this migrating, hot iron core powers its long-unique magnetic field via a ‘cold-start’ dynamo; the results don’t fully overturn older theories, but they offer a new mechanism to explain why Ganymede’s dynamo persists while Callisto shows no obvious one, with implications for Europa and future data from Europa Clipper and Juice.

via Gizmodo|

#core #dynamo #ganymede

space3 months ago•58 min saved

Ganymede’s hidden heat may power a late-forming magnetic dynamo

New Science Advances study suggests Jupiter’s moon Ganymede could have formed a metal core later than previously thought and still sustain a magnetic field via a warming-driven dynamo powered by protracted core formation, radioactive heating, and tidal forces. This challenges the idea that dynamos always originate early and cool over time, and implies Ganymede’s magnetism—potentially active today—arises from a “warm start” process that could influence how we think about magnetic fields on other worlds, including exoplanets.

via Live Science|

#dynamo #ganymede #jupiter

space3 months ago•14 min saved

Ganymede’s secret core may still be forming after billions of years

A new study suggests Jupiter’s moon Ganymede could still be differentiating its metallic core billions of years after formation, with iron–sulfur melt slowly feeding a protocore that powers a long‑lived magnetic dynamo and likely an ocean beneath its ice. If correct, this ongoing core growth could explain why Ganymede remains magnetically active while other moons fade, and future missions like JUICE may test the idea.

via Interesting Engineering|

#core-formation #ganymede #icy-moons

astronomy5 months ago•53 min saved

Ganymede's auroras echo Earth's northern lights, NASA finds

A 2021 Juno flyby showed Ganymede's ultraviolet auroras break into bead-like patches, not smooth ovals, mirroring Earth’s auroras and driven by Jupiter's magnetosphere; the finding by LPAP Liège researchers highlights Ganymede’s unique magnetic field and sets the stage for further study by the JUICE mission.

via Space|

#astronomy #auroras #ganymede

science1 year ago•2 min saved

Ganymede: The Solar System's Largest Moon as a Potential Dark Matter Detector

Physicist William DeRocco proposes using Ganymede, Jupiter's largest moon, as a massive dark matter detector by searching for 'dark matter craters' caused by large dark matter particles impacting its icy surface, potentially observable by spacecraft like NASA's Europa Clipper or ESA's JUICE.

via Gizmodo|

#dark-matter #ganymede #jupiter

science1 year ago•5 min saved

Infrared Tech May Detect Alien Ice Types

Researchers have developed a method using infrared spectroscopy to identify different exotic ice phases on icy moons like Ganymede, which could provide insights into their internal structures without needing to return samples to Earth, leveraging observations from telescopes like JWST.

via eos.org|

#exotic-ice #ganymede #ice-phases

science1 year ago•4 min saved

Largest Moon in Solar System May Reveal Dark Matter Secrets

Scientists propose using Ganymede, the largest moon in our Solar System, as a detector for macroscopic dark matter objects, which could leave unique impact signatures detectable by upcoming space missions like JUICE and Europa Clipper, potentially unlocking new insights into the elusive dark matter that makes up most of the universe's mass.

via The Daily Galaxy|

#dark-matter #ganymede #jupiter-moons

science-and-technology2 years ago•3 min saved

"Iron Snowstorms Inside Ganymede May Unlock Secrets of Its Magnetic Mysteries"

Researchers have conducted an experimental study to understand Ganymede's strong magnetic field, testing the 'iron snow' theory which suggests iron crystallizes and falls within the moon's core, similar to a snowglobe. The laboratory experiment used water ice to simulate iron snow crystals and found that crystallization occurs in sporadic bursts when the liquid reaches a supercooled state. This process could explain the dynamic nature of Ganymede's magnetic field and may also apply to other small planetary bodies in the solar system. Earth's core, however, operates differently due to its powerful gravity and material composition.

via ScienceAlert|

##ganymede #ironsnow

space2 years ago•3 min saved

"Unveiling the Secrets of Ganymede's Mysterious Ocean"

NASA's Juno mission has detected salts and organic compounds on Jupiter's moon Ganymede, providing strong evidence of a subsurface ocean beneath its icy crust. The salts and organics suggest an endogenic origin, possibly rising from the depths of Ganymede through cracks in the surface. While the presence of organics does not guarantee the presence of life, it raises the possibility of Ganymede's potential to support life. Further research is needed to determine the exact origin of the compounds and the extent of Ganymede's ocean.

via Ars Technica|

#astrobiology #ganymede #juno-mission

space2 years ago•4 min saved

Juno's Discovery: Organic Compounds and Potential Alien Life on Ganymede

NASA's Juno spacecraft, during its flyby of Jupiter's moon Ganymede in 2021, has discovered the presence of mineral salts and organic compounds on the moon's surface. The high-resolution spectroscopic observations made by Juno's Jovian Infrared Auroral Mapper (JIRAM) spectrometer revealed the presence of hydrated sodium chloride, ammonium chloride, sodium bicarbonate, and possibly aliphatic aldehyde. These findings provide insights into Ganymede's formation and the composition of its deep subsurface ocean. The localized distribution of these compounds suggests that Ganymede's magnetic field shields them from surrounding radiation. Further investigations by upcoming missions like ESA's JUICE and NASA's Europa Clipper will provide more detailed observations of Ganymede and other icy moons in Jupiter's system.

via NASASpaceflight.com|

#ganymede #juno #organic-compounds

space2 years ago•5 min saved

Juno Mission Uncovers Organics and Salts on Jupiter's Moon Ganymede

NASA's Juno mission has discovered mineral salts and organic compounds on Jupiter's moon Ganymede. Data collected by the Jovian InfraRed Auroral Mapper (JIRAM) spectrometer during a close flyby revealed the presence of hydrated sodium chloride, ammonium chloride, sodium bicarbonate, and possibly aliphatic aldehydes. These findings provide insights into the composition of Ganymede's deep ocean and its formation process. The discovery was made possible by Juno's unprecedented spatial resolution for infrared spectroscopy, offering a closer look at the moon's surface. Ganymede, the largest moon of Jupiter, has long been of interest due to its hidden internal ocean of water beneath its icy crust.

via SciTechDaily|

#ganymede #jiram #juno-mission

space2 years ago•3 min saved

Ganymede's Salty Surface Reveals Organics, Confirms NASA

NASA's Juno spacecraft has discovered mineral salts and organic compounds on Jupiter's moon Ganymede, providing insights into the moon's origin and composition. The data suggests the presence of a deep ocean brine that reached the moon's surface. Ganymede, the largest moon in the solar system, has a magnetic field and an underground sea beneath its icy shell. The findings could aid in understanding other distant moons and dwarf planets in the solar system and beyond.

via Forbes|

#ganymede #juno-spacecraft #nasa

space2 years ago•3 min saved

Juno's Discovery: Salts and Organics Found on Ganymede's Surface

NASA's Juno mission has discovered mineral salts and organic compounds on the surface of Jupiter's moon Ganymede. The JIRAM spectrometer aboard the spacecraft collected data during a close flyby, revealing the presence of hydrated sodium chloride, ammonium chloride, sodium bicarbonate, and possibly aliphatic aldehydes. These findings provide insights into the moon's composition and its briny past, shedding light on the origin of Ganymede and its deep ocean.

via Phys.org|

#ganymede #jiram-spectrometer #juno-mission