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Neptune

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Harvest Moon 2026: Saturn and Neptune Join the Full Moon in a Rare Autumn Alignment
astronomy13 days ago

Harvest Moon 2026: Saturn and Neptune Join the Full Moon in a Rare Autumn Alignment

The 2026 Harvest Moon reaches full illumination on September 26, coinciding with the autumnal equinox and offering a rare celestial pairing with Saturn and Neptune. While the moon is technically brightest at midday, observers are advised to view it just after sunset to appreciate its warm hue and proximity to the ringed planet. This event is notable for its unusually close moonrise times across consecutive evenings, a phenomenon that historically aided farmers in extending harvest hours. The alignment provides a naked-eye opportunity to see Saturn, with Neptune visible only through optical aids.

via Space|
#astronomy#autumnal-equinox#harvest-moon
September's Harvest Moon Peaks with Saturn and Neptune in a Rare Sky Alignment
science14 days ago

September's Harvest Moon Peaks with Saturn and Neptune in a Rare Sky Alignment

The September 2026 full moon, known as the Harvest Moon, reaches peak illumination on Saturday, September 26, at 12:49 p.m. ET. This celestial event coincides with a rare alignment where Saturn appears near the moon between Friday and Monday, offering a dual viewing opportunity. The moon’s proximity to the autumnal equinox, which occurred on Tuesday, reinforces its traditional name. While the moon is brightest at midday, optimal viewing occurs just after sunset. Saturn will reach its best visibility on October 4, but its current position near the moon makes it a notable sight this weekend. Neptune is also nearby but requires binoculars or a telescope for clear observation. The Harvest Moon’s traditional name stems from its historical use by farmers to extend harvesting hours after sunset. Indigenous groups have various names for this moon, including 'corn maker' and 'yellow leaf.' The orange glow often associated with the Harvest Moon is due to atmospheric scattering when the moon is near the horizon. Three more full moons are expected in 2026, including supermoons in November and December.

via CNN|
#astronomy#autumn-equinox#harvest-moon
Lab Recreates Superionic Ice, Shedding Light on Ice Giants’ Cores
physics-and-chemistry29 days ago

Lab Recreates Superionic Ice, Shedding Light on Ice Giants’ Cores

Researchers used diamond anvil cells and synchrotron X-rays to heat water to roughly 2,357 C and pressures up to 200 GPa, observing the predicted superionic ice (ice X) where oxygen forms a lattice and hydrogen ions move freely, matching theoretical models of ice giants’ interiors—though decades of work remain to confirm Neptune/Uranus mappings.

via Gizmodo|
#ice-phases#neptune#physics-and-chemistry
September Skywatch: Venus, a Diamond Moon by the Pleiades, and Neptune at Opposition
science1 month ago

September Skywatch: Venus, a Diamond Moon by the Pleiades, and Neptune at Opposition

September 2026 offers a string of prime stargazing opportunities: Venus near Spica on Sept 1–2, a Diamond Moon visible alongside the Pleiades on Sept 3 (and again near Sept 30), a modest Epsilon Perseids meteor shower on Sept 9–10, Venus at its brightest around Sept 22, the Sept 23 equinox signaling the change of seasons, Neptune at opposition on Sept 26 for a favorable telescope view, and the Harvest Moon closing out the month.

via WIRED|
#astronomy#neptune#pleiades
Webb Finds Ancient Hydrated Clay on Neptune’s Inner Moons, Hinting at a Lost Satellite System
space1 month 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
space2 months 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
Neptune’s Supersonic Winds Break Solar System Speed Records
science2 months ago

Neptune’s Supersonic Winds Break Solar System Speed Records

Neptune hosts the solar system’s fastest winds—about 2,000 km/h (roughly 1,200 mph)—well above Earth’s Category 1 hurricane speeds (minimum 119 km/h). These speeds were first inferred from Voyager 2’s 1989 cloud-tracking flyby and later confirmed by ALMA measurements at known pressure levels. Scientists think the winds are powered more by internal heat and planetary rotation than by sunlight, with a shallow atmospheric layer (roughly 1,000 km deep) driving the stormy weather. Neptune’s extreme distance means little solar input, and with one Neptune year equal to 165 Earth years, our data come from a small, early snapshot—awaiting future probes to reveal more of its atmospheric mysteries.

via Space Daily|
#atmospheric-dynamics#neptune#science
Webb Finds Clues to Neptune’s Ancient Cataclysm and Reborn Moon System
science2 months 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
space2 months 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
space2 months 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
space2 months 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
Dreams Align: Five Zodiac Signs Hit Positive Shifts on Saturday
lifestyle2 months ago

Dreams Align: Five Zodiac Signs Hit Positive Shifts on Saturday

On Saturday, July 25, 2026, five zodiac signs (Aries, Pisces, Scorpio, Leo, and Libra) enjoy favorable horoscopes as Neptune sextiles Pluto, aligning dreams with action. This energy encourages pursuing goals, potential financial improvements, family and lifestyle growth, a romantic shift for Leo, and possible pregnancy or engagement announcements, with Neptune softening Pluto’s intensity to keep changes hopeful rather than overpowering.

via YourTango|
#astrology#horoscope#lifestyle
Neptune's Hidden Engine Drives Solar-System's Fastest Winds
space2 months ago

Neptune's Hidden Engine Drives Solar-System's Fastest Winds

Neptune hosts the fastest winds in the solar system—over 2,000 km/h—despite daylight being about 900 times dimmer than Earth’s, because it radiates more internal heat than it absorbs from the Sun. Rapid rotation, convection, atmospheric waves and low drag organize this energy into broad east-west jets; the planet’s weather layer is likely relatively shallow, and a heat surplus drives the storms. Voyager 2 measured near-2,000 km/h winds during its 1989 flyby; later observations show persistent jets with changing vortices, but the exact mechanism remains debated and likely a combination of internal heat, atmospheric dynamics, and rotation. Future missions could help pinpoint how Neptune converts energy into its striking winds.

via Space Daily|
#atmospheric-dynamics#internal-heat#jet-streams