https://www.smithsonianmag.com/smart-news/a-rare-meteorite-found-in-the-sahara-desert-offers-evidence-of-a-lost-protoplanet-180988932/I am a bit skeptical that this came from a Pluto-size protoplanet. How likely this comes from a protoplanet and not from Earth itself due to a combination of convection of molten material in the mantle and an asteroid or comet collision accelerating a portion of the ejecta to Earth escape velocity where it wandered in near-earth orbit before being recaptured by Earth's gravity.
>>16999782>Piece of a protoplanetsounds like a profanity from some sci-fi show
>>16999784ur such a cringe basedlenial gooner, you are the successor of op’s successor, odd.
>>16999782You might want to look at the primary sourcehttps://www.sciencedirect.com/science/article/abs/pii/S0012821X26002128How could it have come from Earth, when the sharp edges suggest it could not have been molten?Long shot: this is a fragment from 16 Psyche.
>>16999901>You might want to look at the primary source>https://www.sciencedirect.com/science/article/abs/pii/S0012821X26002128>How could it have come from Earth, when the sharp edges suggest it could not have been molten?>Long shot: this is a fragment from 16 Psyche.Yes, I should have done that. Having said that, how would the mineral get from the minimum 1000 km depth needed to form it to interplanetary space to eventually crash land on Earth except either by1. a catastrophic destruction of the body, which is the current theory2. by convection to the surface before being ejected into space by a collision that would only effect the crustAs for the sharp edges, the object could have solidified first in the crust and then be ejected into space by an asteroid size collision and breaking into sharp jagged pieces.
>>16999935Seems catastrophic destruction is more plausible. You don't have to go deep into the Earth before things get soft because of the heat. So yes, that makes it plausible that the protoplanet cooled down quickly (small size, lack of heat generating core) and then was cracked open, spraying fragments everywhere in the solar system.A collision that would affect the crust only would be like the process where Theia hit Earth and formet the Moon. It was sufficiently cataclysmic that much was liquefied.
