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Mercury Shrinks Faster Than Thought, Rewriting Inner-Core Clues
science22 days ago

Mercury Shrinks Faster Than Thought, Rewriting Inner-Core Clues

German Aerospace Center researchers estimate Mercury’s global shrinkage is 10–30% faster than previously thought, implying a total contraction of about 7.5–23 km over its history. By combining contraction features with surface roughness maps, they suggest hidden deformation under rough terrain may account for the higher rate, which could indicate a larger or more complex metal core and alter models of Mercury’s geodynamics. The finding uses older MESSENGER data; higher‑resolution maps from ESA’s BepiColombo arriving in 2026 are expected to refine the estimate further.

via Universe Today|
#bepicolombo#contraction#mercury
Mercury Shrinks More Than Thought, Offering Clues About Its Hidden Interior
science27 days ago

Mercury Shrinks More Than Thought, Offering Clues About Its Hidden Interior

A Geophysical Research Letters study using MESSENGER data suggests Mercury has contracted by about 7.2 miles, 10-30% more than previously thought, likely exposing new details about its large core and interior; the upcoming BepiColombo mission will provide topographic data to test these contraction estimates and deepen understanding of how rocky planets evolve.

via KSL.com|
#bepicolombo#contraction#mercury
Mercury’s shrinking pace may be faster than scientists expected
science28 days ago

Mercury’s shrinking pace may be faster than scientists expected

A new study suggests Mercury is shrinking up to 14 miles (23 kilometers) in diameter—about 30% faster than previously thought—likely due to cooling of its large iron core; the rough surface from impacts can hide wrinkles, and data from the BepiColombo mission, along with earlier Messenger measurements, should help confirm how much Mercury has contracted.

via NBC Connecticut|
#bepicolombo#mercury#messenger
Mercury’s shrinkage accelerates beyond prior estimates
science29 days ago

Mercury’s shrinkage accelerates beyond prior estimates

A Geophysical Research Letters study finds Mercury may be contracting faster than thought—possibly up to 14 miles in diameter (about 30% more than earlier estimates)—as its hot core cools and the surface wrinkles tighten. Researchers say rough, debris-covered regions may hide some shrinking, with findings building on NASA’s MESSENGER data and awaiting confirmation from the BepiColombo mission’s closer Mercury observations to refine how Mercury’s evolution is playing out.

via NBC News|
#bepicolombo#mercury#messenger
Mercury’s Polar Ice: How Billions of Tonnes Stay Frozen in Eternal Shadow
space2 months ago

Mercury’s Polar Ice: How Billions of Tonnes Stay Frozen in Eternal Shadow

Mercury can reach about 430°C in sunlit areas, but its poles host billions of tonnes of water ice tucked in permanently shadowed craters. The planet’s near-absence of atmosphere and the geometry of crater shadows keep these deposits cold and insulated, so they persist rather than melt. The ice is likely delivered by comets, water-rich asteroids, or solar-wind interactions over time, not formed in place. MESSENGER measurements suggest a mass range from about 20 billion to 1 trillion tonnes, and the upcoming BepiColombo mission should refine these figures. The ice is better viewed as a frozen archive of volatile delivery rather than a subsurface ocean.

via Space Daily|
#bepicolombo#mercury#messenger
Mercury’s permanently shadowed polar floors cradle water ice, revealed by MESSENGER data
sciencespace2 months ago

Mercury’s permanently shadowed polar floors cradle water ice, revealed by MESSENGER data

Mercury’s cold polar crater floors hold water ice on permanently shadowed terrain, a conclusion supported by MESSENGER (2012) via radar-bright deposits, a hydrogen signal from neutron measurements, exposed versus buried ice seen in laser altimetry, and thermal models. Ice can be exposed in some areas and buried under a thin, dark cover in others; deposits may range from metres to tens of metres thick, and their age and origin remain topics of study, with delivery likely from comets/asteroids over hundreds of millions of years. The upcoming BepiColombo mission will map these regions in greater detail but will not land in the cold traps.

via Space Daily|
#mercury#messenger#polar-craters
Mercury’s Wrinkles Reveal a Shrinking World as Its Core Cools
space2 months ago

Mercury’s Wrinkles Reveal a Shrinking World as Its Core Cools

Mercury has cooled enough to shrink its radius by roughly 1–7 kilometers, leaving long lobate scarps that wrinkle the planet’s surface; recent analyses place the amount of contraction near 6.3 km when wrinkle ridges are counted and about 1.2 km when they’re excluded, highlighting a debate over whether the deformation records global shrinkage or mainly local faulting. The upcoming ESA–JAXA’s BepiColombo mission, arriving in 2026–27, is expected to help resolve how much of Mercury’s contraction is global versus localized.

via Space Daily|
#crustal-shortening#mercury#messenger
Global Facebook outage knocks out Messenger and the main app
technology3 months ago

Global Facebook outage knocks out Messenger and the main app

Facebook and its Messenger app went down in a global outage, logging users out with “an unexpected error” messages while the main site struggled; Instagram and WhatsApp largely stayed online, though some Instagram features were affected. Meta did not provide a consumer status page at the time, Downdetector reported widespread disruption, and updates tracked the outage in a live blog as users and services tried to recover.

via Yahoo Finance UK|
#facebook#messenger#meta
Mercury’s Day Is Longer Than Its Year: 176 Earth-Day Sunrises
space3 months ago

Mercury’s Day Is Longer Than Its Year: 176 Earth-Day Sunrises

Mercury’s solar day (sunrise to sunrise) lasts 176 Earth days, because the planet spins once every 59 Earth days but orbits the Sun every 88 days, locking into a 3:2 spin-orbit resonance. As a result, a given spot on Mercury faces the Sun for two Mercury years before sunrise repeats, and the Sun can appear to rise, set, and rise again in a single day. This geometry—paired with a thin atmosphere—produces extreme day-night temperatures and explains why a “day” on Mercury is two years long, even though its year is just 88 days.

via Space Daily|
#mercury#messenger#nasa
Meta Shuts Down Messenger.com, Moves Web Messaging Into Facebook
technology7 months ago

Meta Shuts Down Messenger.com, Moves Web Messaging Into Facebook

Meta will retire messenger.com and discontinue the Messenger desktop app, with messenger.com no longer available for messaging starting April 2026. Web messaging will move to facebook.com/messages and be integrated into Facebook rather than a standalone Messenger platform, while Messenger remains available on mobile. The move signals Meta’s broader shift toward consolidating messaging across its apps and reducing maintenance across separate tools amid regulatory and strategic considerations.

via Social Media Today|
#facebook#messaging#messenger
Messenger Enhances Video Calls with HD, AI Backgrounds, and More
technology1 year ago

Messenger Enhances Video Calls with HD, AI Backgrounds, and More

Meta is enhancing its Messenger app with HD video calling, noise suppression, and AI-generated backgrounds to compete with other video calling apps like Zoom and FaceTime. These features, including the ability to leave voice or video messages, are now available, with HD calling enabled by default on Wi-Fi. Users can also use Apple's Siri for hands-free calling and messaging through Messenger.

via The Verge|
#ai#messenger#meta
Meta Enhances Messenger with AI Backgrounds and HD Video Calls
technology1 year ago

Meta Enhances Messenger with AI Backgrounds and HD Video Calls

Meta has announced new features for Messenger Calling, including AI-generated backgrounds for video calls, HD video quality, background noise suppression, and voice isolation to enhance call clarity. Users can also leave audio or video messages for missed calls and utilize hands-free calling and messaging through Siri. These updates aim to make Messenger Calling more reliable and enjoyable, reflecting Meta's commitment to improving user connectivity.

via Meta Store|
#ai#messenger#meta