Analysis of the Almahata Sitta meteorite reveals that it is an achondrite, a rare type of space rock that comes from celestial bodies that are large enough to generate internal heat early in their history so as to produce metallic cores surrounded by rock. (scientificamerican.com)
Surprising findings from some of the oldest known meteorites suggest that our solar system was once chock - full of miniature planets, complete with metallic cores and rocky crusts. (sciencemag.org)
This field most likely originated from crustal remanence produced by an earlier dynamo, suggesting that Vesta formed an advecting liquid metallic core. (science.sciencemag.org)