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Shadow Play Across the Solar System: Planets and the Hidden Power of Eclipses
space10 days ago

Shadow Play Across the Solar System: Planets and the Hidden Power of Eclipses

Solar eclipses occur when a moon passes between a planet and the Sun, casting a shadow that researchers use to study motion, atmospheres, and gravity. The article notes Io's frequent shadow on Jupiter as an example, recounts Earth's historic use of eclipses and the 1919 test of general relativity, highlights the 1973 Concorde flight that extended totality to 74 minutes for coronal observations, and describes Phobos transits on Mars used to measure orbital decay—demonstrating the same geometric rules govern eclipses across the solar system.

via Futura, le média qui explore le monde|
#io#jupiter#orbital-dynamics
Juno uncovers buried heat beneath Io's volcanic crust
space-and-astronomy22 days ago

Juno uncovers buried heat beneath Io's volcanic crust

NASA’s Juno spacecraft used its Microwave Radiometer to measure heat beneath Io’s surface for the first time, finding temperatures rise sharply within a few feet of the crust (more than 40°F). The findings suggest a thin, porous surface layer and heat moving through Io’s crust that could result from conduction or cooling lava flows, offering new insights into tidal heating that powers Io’s volcanism and potentially informing heat processes on other worlds with buried oceans; future high-resolution observations could distinguish between conduction and lava-driven heating.

via Yahoo|
#io#io-subsurface-temperature#juno-spacecraft
Juno uncovers Io's buried heat, hinting at lava flows or rapid subsurface conduction
space22 days ago

Juno uncovers Io's buried heat, hinting at lava flows or rapid subsurface conduction

NASA’s Juno spacecraft, using its Microwave Radiometer, measured Io’s subsurface temperatures for the first time and found a sharp, 40+ degree Fahrenheit rise within feet of the surface. The results from two close flybys (2023–2024) suggest heat moving through Io’s crust by conduction or stemming from buried lava flows, offering a new way to study tidal heating and heat transport on rocky worlds and potentially informing heat dynamics on other moons.

via thebrighterside.news|
#io#juno-mission#microwave-radiometer
Juno Reveals Subsurface Heat Beneath Io, Solar System's Most Volcanic Moon
space29 days ago

Juno Reveals Subsurface Heat Beneath Io, Solar System's Most Volcanic Moon

NASA's Juno spacecraft, using its Microwave Radiometer, detected heat rising beneath Io’s surface during two close flybys, revealing a subsurface temperature gradient of more than 40°F a few feet deep. The heat could come from a conductive crust or cooling lava flows and underscores Io's extreme tidal heating, offering insights into volcanism and potentially informing studies of subsurface oceans on other worlds.

via Gizmodo|
#io#juno#jupiter
Juno Reveals Io's Hidden Heat: Subsurface Clues to a Volcanic Powerhouse
space-exploration1 month ago

Juno Reveals Io's Hidden Heat: Subsurface Clues to a Volcanic Powerhouse

NASA's Juno spacecraft used its Microwave Radiometer to peer beneath Io's surface during late-2023 and early-2024 flybys, uncovering a buried heat signature with temperatures rising several feet below the crust and localized warm pockets. The findings, published in the Journal of Geophysical Research: Planets, show heat moving through Io's crust by conduction or from cooling lava, driven by Jupiter's tidal forces, and offer insights for understanding volcanism on Earth and subsurface oceans on other icy moons such as Europa and Ganymede.

via Space|
#io#juno#jupiter
Windrose Early Access pummels SSDs with extreme writes, patch tames the load
technology3 months ago

Windrose Early Access pummels SSDs with extreme writes, patch tames the load

Windrose, a piracy-themed RPG released on Steam Early Access, was found to cause extreme disk I/O that could wear SSDs due to RocksDB misconfiguration (three databases with a tiny cache and WAL budget), driving tens of thousands of writes per second. A housekeeping patch released by Kraken Express on April 30 dramatically reduced the write rate (roughly 90k–130k writes/sec pre-patch to about 20–60 writes/sec in heavy play), and players are urged to update to protect hardware.

via TechSpot|
#early-access#io#rocksdb
JWST reveals Io’s cold footprint in Jupiter’s auroras
astronomy5 months ago

JWST reveals Io’s cold footprint in Jupiter’s auroras

NASA’s James Webb Space Telescope captured a surprising cold spot and unusually high ion density beneath Io’s auroral footprint on Jupiter, showing real-time interactions between the planet’s magnetic field and its Galilean moons. The cold patch (~265°C) and dense plasma arise from Io’s volcanic plumes feeding a surrounding plasma torus, altering the aurora as ions crash into Jupiter’s atmosphere. Scientists will pursue follow-up observations to determine how often these footprints occur, with the findings published in Geophysical Research Letters.

via Space|
#astronomy#auroras#io
Juno Spots Io's Most Powerful Volcanic Eruption Yet
space6 months ago

Juno Spots Io's Most Powerful Volcanic Eruption Yet

NASA's Juno spacecraft captured what scientists describe as the solar system's most energetic eruption observed on Io, with multiple volcanoes lighting up simultaneously from a vast subterranean magma network. The Dec. 27, 2024 event, spotted by JIRAM during a flyby about 74,400 km above Io, released an estimated 140–260 terawatts of power and covered about 40,400 square miles (65,000 sq km). Io harbors around 400 active volcanoes driven by Jupiter's tidal forces. The synchronized eruption suggests interconnected magma reservoirs beneath Io's lava-encrusted surface, and future Io flybys will map new lava flows and ash deposits.

via Space|
#io#juno#jupiter
Io Unleashes Solar System’s Most Powerful Volcanic Outburst, NASA Finds
space6 months ago

Io Unleashes Solar System’s Most Powerful Volcanic Outburst, NASA Finds

NASA’s Juno spacecraft detected the solar system’s most energetic eruption on Io—a 40,000-square-mile hotspot in the moon’s southern hemisphere emitting well over 80 trillion watts from multiple simultaneous sources, suggesting a vast interconnected magma system; observed by JIRAM during the December 27, 2024 flyby with visible surface changes near Io’s south pole, and researchers plan a March 3 flyby recheck.

via Gizmodo|
#hot-spot#io#jiram
Webb Telescope Reveals Intense Volcanic Activity on Jupiter’s Moon Io
science9 months ago

Webb Telescope Reveals Intense Volcanic Activity on Jupiter’s Moon Io

Scientists using NASA's Juno data have found that Jupiter's moon Io is emitting hundreds of times more heat than previously estimated, mainly from localized volcanic sources, challenging the idea of a global magma ocean beneath its surface. This new understanding results from analyzing different infrared spectral data, revealing that Io's volcanoes have hot outer rings and cooler centers, which significantly increases the estimated heat flux. The findings suggest that previous models based solely on certain infrared bands may have underestimated Io's thermal output, but do not definitively rule out the existence of a magma ocean. Future missions may provide more detailed insights into Io's intense volcanism.

via Space|
#heat-emission#io#juno-spacecraft