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Nwa 12774

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science1 month ago•13 min saved

Meteorite uncovers evidence of a vanished Moon-sized world from the early solar system

Analysis of the 2019 Sahara meteorite NWA 12774, an angrite, yields formation pressures of at least 17.5 kilobars, suggesting it formed in a large, differentiated body rather than a small asteroid. If valid, this implies a Moon-sized (or larger) parent world that formed early in the solar system and was destroyed in a giant collision, leaving behind a chemical fingerprint. The claim is not yet consensus and cannot map the parent body's orbit or full history, but it reshapes ideas about vanished worlds in our solar system.

via Space Daily|

#angrites #early-solar-system #meteorite

science1 month ago•11 min saved

Desert rock hints at a moon-sized world shattered in the Sun’s early days

A fist-sized Sahara meteorite called NWA 12774 is an angrite whose chemistry, analyzed with a new pressure-based barometer, implies it formed inside a large parent body—potentially Moon-sized—under high pressure and was destroyed during the solar system’s infancy. Its silica-poor composition points to a formation pathway different from Earth or Mars. If correct, this would be evidence for a vanished protoplanet whose debris helped seed the early planets; further independent checks on similar meteorites are needed to confirm the giant-parent picture.

via Space Daily|

#angrites #early-solar-system #meteorite

space2 months ago•6 min saved

Lost Mars-Sized Protoplanet Revealed by Tiny Meteorite Clues

A study of the 2019-found NWA 12774 angrite meteorite uses microprobe analyses and geobarometry to argue its parent body was a large planetary embryo. Estimated to have had a radius from about 1,000 km up to roughly 3,300 km (Mars-sized at the high end), this suggests a once-present world that shattered or was dispersed, with fragments landing on Earth and elsewhere in the Solar System. The work is published in Earth and Planetary Science Letters.

via ScienceAlert|

#angrites #early-solar-system #geobarometry

science2 months ago•35 min saved

Desert Meteorite Hints at a Lost Planet’s Ancient Beginnings

Scientists analyze a roughly one-pound angrite meteorite found in the Sahara (NWA 12774) and argue it formed on a large parent body billions of years ago, perhaps 1,118–2,050 miles in diameter. The mineral clinopyroxene and unusually preserved crystal edges suggest formation under extreme pressure on a very large body, implying a distinct early planetary formation path separate from Earth and Mars. Fragments from that lost world likely scattered across the solar system and eventually landed on Earth, hinting there may be other ancient protoplanets waiting to be discovered.

via Yahoo News New Zealand|

#angrite-meteorite #desert-meteorite #early-solar-system

space2 months ago•72 min saved

Sahara meteorite reveals a vanished protoplanet in the early solar system

A rare Sahara meteorite, NWA 12774, is identified as an angrite whose unusual chemistry and formation under extreme pressures imply its parent body was a Moon-sized protoplanet, offering the first definitive evidence of a long-lost world that formed early in the solar system.

via Space|

#angrite #early-solar-system #lost-protoplanet