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Triton

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Webb Finds Ancient Hydrated Clay on Neptune’s Inner Moons, Hinting at a Lost Satellite System
space11 days ago

Webb Finds Ancient Hydrated Clay on Neptune’s Inner Moons, Hinting at a Lost Satellite System

NASA’s JWST detected magnesium-rich phyllosilicates on Neptune’s tiny inner moons Larissa and Galatea and on its rings, a hydrated mineral signature formed by liquid water. The small, cold moons could not have heated enough to create these minerals, implying they inherited them from much larger, differentiated icy satellites that were shattered when Neptune captured Triton. Fragments from that primordial system likely remain as the current inner moons and rings, with Nereid possibly a surviving member; the researchers note alternate scenarios and call for more simulations and spectra to confirm the history.

via Space Daily|
#neptune#phyllosilicates#rings
Voyager 2 nails Neptune flyby with golf-putt precision
space21 days ago

Voyager 2 nails Neptune flyby with golf-putt precision

After a 12-year, 7.13-billion-km journey, Voyager 2 arrived at Neptune within 100 km of its planned point—a margin NASA likens to a golf-putt 3,630 km long—thanks to gravity assists and precise tracking; the flyby passed 29,240 km from Neptune’s centre and about 4,950 km above its north pole, and revealed six new moons, four rings, and Triton’s geysers, making it the only close Neptune visit to date and fueling discussion of future ice-giant missions.

via Space Daily|
#gravity-assist#neptune#neptune-flyby
Webb Finds Clues to Neptune’s Ancient Cataclysm and Reborn Moon System
science24 days ago

Webb Finds Clues to Neptune’s Ancient Cataclysm and Reborn Moon System

James Webb Space Telescope observations of Neptune’s inner moons and dusty rings detect clay minerals that require long-term water–rock interactions, implying these moons expose deep interiors from a past catastrophe. The study supports a scenario in which Triton was captured early, disturbing Neptune’s original moons and leaving the current inner moons to form from the resulting debris.

via Dawn|
#clay-minerals#early-solar-system#james-webb-telescope
Neptune’s moons bear water-rich clues from a catastrophic past
space24 days ago

Neptune’s moons bear water-rich clues from a catastrophic past

JWST observations detect magnesium-rich phyllosilicates on Neptune’s inner moons Larissa and Galatea, implying subsurface ice and past interior heating before their destruction, while Proteus lacks these minerals; a proposed scenario suggests Neptune’s original moon system was destroyed by Triton’s capture, scattering materials into a debris disk that formed rings and current moons, with an unidentified hydrated mineral common to all three moons and an alternative hypothesis that it came from a tidally disrupted Kuiper Belt object.

via futura-sciences.com|
#hydrated-minerals#jwst#neptune
Neptune's inner moons may be icy relics from a cataclysmic past
space25 days ago

Neptune's inner moons may be icy relics from a cataclysmic past

New JWST data suggest Neptune’s inner moons Larissa, Galatea and Proteus may be fragments from ancient icy worlds shattered when Neptune captured Triton. Clay minerals—magnesium-rich phyllosilicates—were detected on Larissa and Galatea, potentially exposing material from deep interiors, while Proteus lacks these minerals. No water ice was detected, complicating the origin story. The researchers propose Triton’s capture turned former moons into rubble that reassembled as Neptune’s inner moons, or that a passing dwarf planet contributed debris. The findings, published July 29 in Science Advances, highlight Neptune’s violent past and the need for an ice-giant mission to study the planet further.

via Space|
#clay-minerals#james-webb-space-telescope#moons
Webb data hint Neptune’s moons were shattered by Triton’s capture
space28 days ago

Webb data hint Neptune’s moons were shattered by Triton’s capture

James Webb Space Telescope observations of Neptune’s inner moons and rings found phyllosilicate clay that formed only with liquid water, implying these materials were shed from a larger body long ago. The most plausible scenario is that Neptune once hosted larger moons that were destroyed when Triton was captured, leaving the current small inner moons and rings. Researchers also spotted a mysterious unidentified mineral that could be a new material, highlighting the potential for further discoveries from a dedicated Neptune mission.

via ABC News & Headlines – Australian Broadcasting Corporation|
#james-webb-space-telescope#moons#neptune
Nereid May Be Neptune's Last Survivor From a Violent Moonpocalypse
space2 months ago

Nereid May Be Neptune's Last Survivor From a Violent Moonpocalypse

A Science Advances study suggests Neptune’s largest moon Triton captured into the planet’s system and wiped out the original moon family, leaving Nereid as a possible native survivor with a highly elongated orbit. JWST infrared data imply Nereid is more like an icy native moon than a captured Kuiper Belt Object, challenging its status as a former KBO. REBOUND simulations show that in about 20% of runs, Triton can eject an inner moon into a long, tilted orbit similar to Nereid’s, implying Nereid could be a frozen relic of Neptune’s violent moon history; confirmation would require a future spacecraft visit.

via sciencealert.com|
#moon#neptune#nereid
Nereid: Neptune’s Last Moon After Triton’s Ancient Arrival
space3 months ago

Nereid: Neptune’s Last Moon After Triton’s Ancient Arrival

Using Webb telescope data and simulations, scientists propose that Neptune’s moon Nereid is the sole survivor of an ancient, Triton-triggered disruption of Neptune’s original moon system; Triton’s capture likely destroyed the other moons, while Nereid was hurled outward into a highly eccentric, distant orbit. Its water-rich surface and Uranian-like signature support its status as the last remnant of Neptune’s early lunar family.

via Gizmodo|
#neptune#nereid#solar-system-history
Nereid: Neptune’s lone survivor of an ancient moon collision
space3 months ago

Nereid: Neptune’s lone survivor of an ancient moon collision

New James Webb Space Telescope data suggest Neptune’s moon Nereid may be the sole survivor of an ancient collision that destroyed Neptune’s original moon system. Its surface appears highly water-rich and CO2-bearing, unlike many Kuiper Belt objects, challenging a captured-origin scenario. Computer simulations indicate Triton’s arrival over 4 billion years ago would have disrupted the system, but Nereid could have endured on a distant, eccentric orbit, potentially rewriting ideas about how moons around ice giants form.

via CNN|
#james-webb-space-telescope#moon#neptune
Nereid: Neptune’s lone survivor of an ancient moon-wide chaos
science-space3 months ago

Nereid: Neptune’s lone survivor of an ancient moon-wide chaos

JWST data suggest Neptune’s moon Nereid may be the only intact remnant of Neptune’s primordial moon system, surviving the disruptive arrival of Triton over 4 billion years ago. Its surface composition is more like regular satellites than Kuiper Belt objects, challenging the idea that it was captured. Computer simulations indicate a roughly 25% chance that some moons could survive the Triton encounter, and further JWST observations or a future Neptune mission could confirm this scenario.

via CNN|
#james-webb-space-telescope#neptune#nereid
"Exploring Neptune's Orbit: The Potential of its Largest Moon"
spaceflight2 years ago

"Exploring Neptune's Orbit: The Potential of its Largest Moon"

Researchers have proposed a radical new idea for a future Neptune orbiter mission by using the thin atmosphere of Triton, Neptune's largest moon, to capture a spacecraft. By employing an aeroshell similar to the one used in NASA's Low-Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID), the researchers suggest that the atmosphere of Triton could sufficiently slow a spacecraft and allow it to enter into a captured orbit around Neptune. This approach could potentially reduce the mission duration to as little as 15 years and provide an up-close view of Triton, delivering valuable scientific insights.

via Space.com|
#aeroshell#neptune#orbiter
"Exploring Neptune's Orbit: The Potential of its Largest Moon"
space-exploration2 years ago

"Exploring Neptune's Orbit: The Potential of its Largest Moon"

Planetary scientists have long been interested in sending a spacecraft to orbit Neptune, but the extreme distance and lack of fuel make it infeasible with current technologies. However, researchers have proposed a radical new idea: using the thin atmosphere of Neptune's largest moon, Triton, to capture a spacecraft. By employing an aeroshell similar to the one used in a recent NASA test, the researchers believe that the atmosphere of Triton could sufficiently slow a spacecraft and allow it to enter into a captured orbit around Neptune. This approach could significantly reduce the mission duration and provide an up-close view of Triton, delivering valuable scientific insights.

via Yahoo! Voices|
#aeroshell#neptune#orbit