# \#meteorites **URL:** https://scanalyst.fourmilab.ch/tag/meteorites/1615.md [Latest](https://scanalyst.fourmilab.ch/latest.md) · [Categories](https://scanalyst.fourmilab.ch/categories.md) · [Tags](https://scanalyst.fourmilab.ch/tags.md) --- ## [Avi Loeb: “Discovery of Spherules of Likely Extrasolar Composition”](https://scanalyst.fourmilab.ch/t/avi-loeb-discovery-of-spherules-of-likely-extrasolar-composition/3677)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 6\ **Last updated:** [20 March 2024 09:22 UTC](https://scanalyst.fourmilab.ch/t/avi-loeb-discovery-of-spherules-of-likely-extrasolar-composition/3677 "2024-03-20T09:22:57Z")
I have posted here earlier about Harvard astronomer and Galileo Project founder Avi Loeb’s expedition to the South Pacific ocean off the coast of Papua New Guinea where, on 2014-01-08, a meteor believed to … --- ## [Meteorite from Planet Earth, or Clever Fake from a Moroccan Suq?](https://scanalyst.fourmilab.ch/t/meteorite-from-planet-earth-or-clever-fake-from-a-moroccan-suq/3546)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 17\ **Last updated:** [5 August 2023 17:08 UTC](https://scanalyst.fourmilab.ch/t/meteorite-from-planet-earth-or-clever-fake-from-a-moroccan-suq/3546 "2023-08-05T17:08:38Z")
A presentation on 2023-07-11 at the European Association of Geochemistry and Geochemical Society Goldschmidt2023 conference in Lyon, France, “Northwest Africa 13188: a possible meteorite … from Earth!”, arg… --- ## [Avi Loeb—Metal Spherules Possibly from Interstellar Meteor Recovered](https://scanalyst.fourmilab.ch/t/avi-loeb-metal-spherules-possibly-from-interstellar-meteor-recovered/3442)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 0\ **Last updated:** [13 July 2023 13:31 UTC](https://scanalyst.fourmilab.ch/t/avi-loeb-metal-spherules-possibly-from-interstellar-meteor-recovered/3442 "2023-07-13T13:31:55Z")
Harvard astronomy professor Avi Loeb’s Galileo Project expedition to the ocean off Papua New Guinea seeking fragments of interstellar meteor CNEOS 2014-01-08 has discovered iron-rich spherules raised from t… --- ## [Avi Loeb—Hunting for an Interstellar Meteor on the Sea Floor off Papua New Guinea](https://scanalyst.fourmilab.ch/t/avi-loeb-hunting-for-an-interstellar-meteor-on-the-sea-floor-off-papua-new-guinea/3335)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 4\ **Last updated:** [21 June 2023 19:34 UTC](https://scanalyst.fourmilab.ch/t/avi-loeb-hunting-for-an-interstellar-meteor-on-the-sea-floor-off-papua-new-guinea/3335 "2023-06-21T19:34:24Z")
On 2014-01-08 a meteor around 0.45 metres in diameter hit Earth’s atmosphere at a velocity around 60 km/sec, which means it was unbound to the solar system and hence an interstellar object. Any fragments t… --- ## [Interstellar Meteorites—“Supernova Bullets”?](https://scanalyst.fourmilab.ch/t/interstellar-meteorites-supernova-bullets/2057)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 0\ **Last updated:** [24 September 2022 13:59 UTC](https://scanalyst.fourmilab.ch/t/interstellar-meteorites-supernova-bullets/2057 "2022-09-24T13:59:26Z")
Two meteors detected by a U.S. Defense Department missile warning satellite have trajectories that indicate they were not gravitationally bound to the Sun and hence arrived from other star systems. Both of… --- ## [Hunting Interstellar Meteorites on Earth](https://scanalyst.fourmilab.ch/t/hunting-interstellar-meteorites-on-earth/1976)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 3\ **Last updated:** [10 September 2022 02:33 UTC](https://scanalyst.fourmilab.ch/t/hunting-interstellar-meteorites-on-earth/1976 "2022-09-10T02:33:35Z")
It has long been speculated that small bodies ejected from their orbits around other stars by encounters with massive objects must occasionally pass through our solar system. The discovery of 1I/ʻOumuamua … --- ## [Exotic Carbon Crystals Found in Chelyabinsk Meteorite Dust](https://scanalyst.fourmilab.ch/t/exotic-carbon-crystals-found-in-chelyabinsk-meteorite-dust/1689)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 0\ **Last updated:** [14 July 2022 11:11 UTC](https://scanalyst.fourmilab.ch/t/exotic-carbon-crystals-found-in-chelyabinsk-meteorite-dust/1689 "2022-07-14T11:11:38Z")
The Chelyabinsk meteor which exploded in the atmosphere over the eponymous Russian city on 2013-02-15 deposited a layer of dust from fragments of the disintegrating bolide. Because the event happened in wi… --- ## [Origins of the Chelyabinsk Meteor](https://scanalyst.fourmilab.ch/t/origins-of-the-chelyabinsk-meteor/1287)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 0\ **Last updated:** [30 April 2022 12:01 UTC](https://scanalyst.fourmilab.ch/t/origins-of-the-chelyabinsk-meteor/1287 "2022-04-30T12:01:24Z")
The Chelyabinsk meteor which exploded on 2013-02-15 at a height of around 29.7 km above the Russian city with a blast estimated between 400 and 500 kilotons of TNT deposited meteorites, one as massive as 54… --- ## [Not of this Earth—Widmanstätten Pattern in Nickel-Iron](https://scanalyst.fourmilab.ch/t/not-of-this-earth-widmanstatten-pattern-in-nickel-iron/1166)
**Author:** [@johnwalker](https://scanalyst.fourmilab.ch/u/johnwalker)\ **Replies:** 0\ **Last updated:** [8 April 2022 12:26 UTC](https://scanalyst.fourmilab.ch/t/not-of-this-earth-widmanstatten-pattern-in-nickel-iron/1166 "2022-04-08T12:26:12Z")
Here is more information on Widmanstätten patterns, found in nickel-iron meteorites. The characteristic giant crystals of kamacite and taenite only form when the metal cools over a period of millions of ye…