#meteorites — Public Fediverse posts

Today is the 69th anniversary of the Pascal B test, a part of the series of nuclear tests called “Operation Plumbbob”.

Pascal B is famous for the fact that in it, the exploding bomb accelerated a 900 kg steel plate to a speed that might have been enough to let it reach Earth's orbit (https://en.wikipedia.org/wiki/Operation_Plumbbob#Missing_steel_bore_cap). The speed was estimated to “six times the escape velocity of Earth” or 67 km/s, but the quality of this estimate is disputed. On the other hand, the plate had such a velocity that a high-speed camera, taking one frame per millisecond, only captured the plate in a single frame. It is also disputed whether the steel plate could reach orbit without being vaporized in Earth's atmosphere.

Nevertheless, if the plate did not reach Earth's orbit, then the makers of Pascal B had instead created the first (and only) artificial reverse meteorite.

#PascalB #OperationPlumbbob #NuclearTest #Meteorites #EscapeVelocity #EarthOrbit

Bolide Light Curve Systematics from 75 Recovered Meteorites: https://onlinelibrary.wiley.com/doi/10.1111/maps.70203 -> New study reveals how space rocks become #meteorites: https://www.seti.org/news/how-space-rocks-become-meteorites/ - analysis of the atmospheric passage of 75 meteorite falls identifies seven distinct processes as space rocks melt, fragment and slow before they fall as meteorites.

Rings forged from meteorites may have been fashionable among ancient Greek elite

https://phys.org/news/2026-08-forged-meteorites-fashionable-ancient-greek.html

Comments: https://news.ycombinator.com/item?id=49298283

#HackerNews #Rings #Meteorites #AncientGreece #Fashion #Archaeology

First Aurora of the season with Perseids

https://makertube.net/w/8LLPAW2wQpGV5mxh3H5QMa

The Meteorites, by Helen Gordon

https://katemacdonald.net/2026/07/28/the-meteorites-by-helen-gordon/

Sugars are essential #biomolecules, serving as metabolic fuels, nucleic acid backbone components and structural or energy-storage polymers.

A central question in origin-of-life research is how monosaccharides formed on the primitive Earth, as laboratory experiments under #prebiotic conditions yield insufficient concentrations.

The detection of #ribose, #glucose and other monosaccharides in #asteroids and #meteorites suggests an exogenous origin, possibly in the interstellar medium (ISM) before meteoritic parent-body formation.

However, no #sugar has been observed in the ISM so far.

Now astronomers report the discovery of #erythrulose, a chiral four-carbon ketose, in the ISM.

Erythrulose appears to be at least eight times more abundant than analogous three-carbon sugars, which remain undetected in our ultrasensitive observations.

Quantum chemical and astrochemical models indicate that erythrulose forms efficiently on interstellar dust grains from simpler two-carbon aldehydes and alcohols.

As ketoses readily isomerize into aldoses in aqueous conditions, interstellar erythrulose could have contributed to the sugar inventory available for early metabolic and replication processes.

#astrobiology #astronomy
https://www.nature.com/articles/s41550-026-02905-7

We discovered a new rock type containing garnet inside a meteorite fragment from Mars
#Science #Mars #Meteorite #Space #Astronomy #Geology #MarsResearch #SpaceExploration #NASA #Meteorites #Earth #Research #Discovery #SolarSystem #Minerals #Garnet #Granet
https://the-14.com/we-discovered-a-new-rock-type-containing-garnet-inside-a-meteorite-fragment-from-mars/

Scientists find ‘smoking gun’ evidence of world’s oldest meteorite strike in Western Australia | Geology | The Guardian
https://www.theguardian.com/environment/2026/jun/24/worlds-oldest-meteorite-strike-pilbara-western-australia

#Geology #Meteorites

Organics in #meteorites: In preparation for ESA’s search for life on #Mars with #RosalindFranklin, researchers from #mpsgoettingen, @unigoettingen and the University Côte d'Azur have investigated the chirality of pristane and phytane in the Murchison meteorite.
Read more here: https://www.mps.mpg.de/mars-mission-a-stress-test-for-the-search-for-life
Or here: https://doi.org/10.1016/j.epsl.2026.120141

Organics in #meteorites: In preparation for ESA’s search for life on #Mars with #RosalindFranklin, researchers from MPS, @[email protected], @[email protected] investigated the chirality of pristane and phytane in the Murchison meteorite. www.mps.mpg.de/mars-mission... @[email protected]

💁🏻‍♀️ TIL: 🌠☄️ #HamiltonCollege astronomer Adam Lark breaks down #asteroids, #comets, #meteors, and #meteorites – where they form, how they light up our sky, and how to spot a real meteorite on the ground.

👉 https://theconversation.com/asteroid-or-comet-meteor-or-meteorite-how-to-identify-and-classify-the-rocks-you-see-streaking-through-the-sky-283958

#solarsystem #astronomy #science #stargazing #meteorshowers #nasa #kids #nightsky #observatory

💁🏻‍♀️ TIL: 🌠☄️ #HamiltonCollege astronomer Adam Lark breaks down #asteroids, #comets, #meteors, and #meteorites – where they form, how they light up our sky, and how to spot a real meteorite on the ground.

👉 https://theconversation.com/asteroid-or-comet-meteor-or-meteorite-how-to-identify-and-classify-the-rocks-you-see-streaking-through-the-sky-283958

#solarsystem #astronomy #science #stargazing #meteorshowers #nasa #kids #nightsky #observatory

The Chicxulub impact was a quick and catastrophic event with lasting consequences. Not talking about the thing with the dinosaurs - it drove significant hydrothermal activity for 8 million years across the entire region.

Link: https://www.nature.com/articles/s43247-026-03618-5

#Impact #Meteorites #Chicxulub

🎙️ This week! O'Shawn (@thathaunter) and Shelby (@itsahaunterslifeforme) are back with @barrettgruber and discuss so much! From #Musk and #AI to #Meteorites!
🎧 Listen wherever you get #podcasts or 📺 Watch on YouTube!
🔗 https://linktr.ee/theallaboutnothingpodcast
🔗 https://bit.ly/AANEp309

There are many types of meteorites, but a bunch of them might have had a common origin in a region just past Jupiter, where planetesimals formed 2–4 million years after solar system formation began.

Link: https://iopscience.iop.org/article/10.3847/1538-4357/ae6104

#Space #Meteorites #SolarFormation

22-May-2026
Different #meteorites, same birthplace
The parent bodies of different meteorites may have formed in the same region of the #solarSystem as indicated by new computer simulations

https://www.eurekalert.org/news-releases/1129325

#science #astrobiology #planets

Different #meteorites, same birthplace: The parent bodies of
different groups of #CarbonaceousChondrites may have formed in the same region of the #SolarSystem.
Published today in #TheAstrophysicalJournal: https://iopscience.iop.org/article/10.3847/1538-4357/ae6104
More here: https://www.mps.mpg.de/different-meteorites-same-birthplace

Different #meteorites, same birthplace: The parent bodies of different groups of #CarbonaceousChondrites may have formed in the same region of the #SolarSystem. Published today in #TheAstrophysicalJournal: iopscience.iop.org/article/10.3... More here: www.mps.mpg.de/different-me...

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💁🏻‍♀️ ICYMI: 🌍🌋 The #Earth's crust accounts for only a tiny fraction of its total volume, leaving the vast majority of our planet largely unseen.

Researchers are studying seismic waves and ancient #meteorites to better understand the continent-sized mystery blobs and unique #minerals located deep beneath our feet.

👉 Learn more: https://seethis.tv/post/earths-layers-crash-course-geology-video

#1960s #earthquake #elements #geography #heat #history #iron #magnesium #mountains #ocean #science #seismology #underground #volcanoes #tksst #video