The origins of the elements and isotopes of cosmic material is a critical aspect of
understanding the evolution of the universe. Nucleosynthesis typically requires physical …

This review presents our understanding of cometary dust at the end of 2017. For decades,
insight about the dust ejected by nuclei of comets had stemmed from remote observations …

Pristine stardust grains from the interstellar gas and dust cloud from which our Solar System
formed some 4.57 billion years ago are present in small quantities in primitive Solar System …

Minerals preserve records of the physical, chemical, and biological histories of their origins
and subsequent alteration, and thus provide a vivid narrative of the evolution of Earth and …

Context. J-type stars are a subclass of carbon stars that are generally Li-rich, not enriched in
s-elements, and have low 12 C/13 C ratios. They were suggested to be the manufacturers of …

We investigated the inventory of presolar silicate, oxide, and silicon carbide (SiC) grains of
fine‐grained chondrule rims in six Mighei‐type (CM) carbonaceous chondrites (Banten …

We report the use of several cluster analysis techniques to evaluate the classification of pre-
solar silicon carbide (SiC) grains. The stability of clusters and the confidence of individual …

Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of
ancient stars that died before the formation of the solar system. The majority (~ 90% in …

Certain types of silicon carbide (SiC) grains, eg SiC-X grains, and low density (LD) graphites
are C-rich presolar grains that are thought to have condensed in the ejecta of core-collapse …

We report a correlated Nano SIMS‐transmission electron microscopy study of the
ungrouped carbonaceous chondrite Northwest Africa (NWA) 5958. We identified 10 presolar …