Boeing Delta II rocket carrying the Stardust spacecraft waiting for launch. Stardust had a close encounter with the comet Wild 2 in January 2004 and also collected interstellar dust containing pre-solar interstellar grains.
Presolar grains are interstellar solid matter in the form of tiny solid grains that originated at a time before the Sun was formed. Presolar stardust grains formed within outflowing and cooling gases from earlier presolar stars.
The stellar nucleosynthesis that took place within each presolar star gives to each granule an isotopic composition unique to that parent star, which differs from the isotopic composition of our solar system's matter as well as from the galactic average. These isotopic signatures often fingerprint very specific astrophysical nuclear processes[1] that took place within the parent star and prove their presolar origin.[2][3]
^Zinner, Ernst (1998). "Stellar Nucleosynthesis and the Isotopic Composition of Presolar Grains from Primitive Meteorites". Annual Review of Earth and Planetary Sciences. 26: 147–188. Bibcode:1998AREPS..26..147Z. doi:10.1146/annurev.earth.26.1.147.
^Bernatowicz, Thomas J.; Walker, Robert M. (1997). "Ancient Stardust in the Laboratory". Physics Today. 50 (12): 26–32. Bibcode:1997PhT....50l..26B. doi:10.1063/1.882049.
^Clayton, Donald D.; Nittler, Larry R. (2004). "Astrophysics with Presolar Stardust". Annual Review of Astronomy and Astrophysics. 42 (1): 39–78. Bibcode:2004ARA&A..42...39C. doi:10.1146/annurev.astro.42.053102.134022.
Presolargrains are interstellar solid matter in the form of tiny solid grains that originated at a time before the Sun was formed. Presolar stardust grains...
SiC would condense into solid grains in the planetary disk; but carbon and SiC grains found in meteorites are presolar based on their isotopic compositions...
rare. Until the 1950s, no other source for moissanite other than as presolargrains in carbonaceous chondrite meteorites had been encountered. Then, in...
percent (%). An exception to this lies with the presolargrains found in primitive meteorites. These small grains condensed in the outflows of evolved ("dying")...
of cosmic dust and is frequently called presolargrains. The measured isotopic compositions in stardust grains demonstrate many aspects of nucleosynthesis...
include "stardust particles" from the present-day interstellar medium. Presolargrains (extracted from meteorites and interplanetary dust particles) that...
of the mass. Grains of silicon carbide and graphite also have anomalous isotopic patterns. Collectively they are known as presolargrains or stardust and...
Lugaro, Maria (2005). Stardust From Meteorites: An Introduction To PresolarGrains. World Scientific. pp. 14, 154–157. ISBN 9789814481373. Hazen, R. M...
Japanese astrophysicist who focuses upon presolargrains. She developed the method for isolating presolargrains in primitive meteorites and also researched...
Press. p. 1.14. ISBN 1-4398-5511-0. "Searching for the Origins of PresolarGrains". Energy.gov. Retrieved 4 February 2023. Paytan, Adina; Yao, Weiqi;...
of meteoritics Panspermia That makes the stardust grains in the Murchison meteorite presolargrains, since they originated at a time before the Sun was...
contain small amounts of organic matter, including amino acids, and presolargrains. Chondrites are typically about 4.55 billion years old and are thought...
individual chondrules and refractory inclusions. Embedded in this dust are presolargrains, which predate the formation of our solar system and originated elsewhere...
Solar System (other carbonaceous chondrites also contain these, and presolargrains are older). The CAIs are 30 million years older than the Earth and...
contained grains older than the solar system. The abundance and composition of these presolargrains were similar when compared to presolargrains in CI chondrites...
precise half-life for some of these isotopes, such as 60Fe and 146Sm. Presolargrains Radiogenic nuclide, the dual concept Radiometric dating List of nuclides...
Meteoritical Society, its highest award, "for her work on the condensation of presolargrains in stellar atmospheres and her compilation of the Solar System Abundances...
but is found in high-grade metamorphic rocks on Madagascar. Some presolargrains in primitive meteorites consist of hibonite. Hibonite also is a common...
Plessite – a fine grained intergrowth found in meteoric iron consisting of kamacite, taenite and tetrataenite lamella. Presolargrains – interstellar solid...
somewhat enriched. A small amount of meteorite materials are small presolargrains (PSGs). These are crystals of material which survives from interstellar...
in Texas. This stratospheric micrometeorite collection, along with presolargrains from meteorites, are unique sources of extraterrestrial material (not...
Before 4.56 Ga, the presolar nebula was a dense molecular cloud consisting of hydrogen and helium gas with dispersed dust grains. When the Sun ignited...
have included the origin and ages of meteorites, the existence of presolargrains in meteorites, the solar-system abundance of chemical elements, and...
chemistry, geology and biology. Her early research was involved with presolargrains from meteorites. Working with Susanne Hofner, their research in 2003...
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