Extraterrestrial microspherules and iron needles in the interstellar medium

Details Extraterrestrial microspherules and iron needles in the interstellar medium Extraterrestrial microspherules and iron needles in the interstellar medium

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.209..143w&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 209, no. 1, p. 143-147

Astronomy and Astrophysics

Astrophysics

1

Absorptivity, Interstellar Matter, Iron, Needles, Spherules, Comets, Optical Polarization, Solar Corona, Solar System Evolution

Scientific paper

Microspherules in Paleozoic-Mesozoic bedded chert, presumed to be of extraterrestrial origin and comprised of clusters of iron needles, may represent an early stage in the aggregation of the inner planets. A fraction of the constituent iron needles will be expected to be carried along with expanding gas to the periphery of the solar nebula where the outer planets and comets condensed. A substantial fraction of iron needles would escape into interstellar space and add to the population of interstellar grains. Iron needles could contribute substantially to interstellar polarization and to the infrared opacity of the interstellar medium.

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