presolar nebula

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• Presolar grains — are isotopically distinct clusters of material found in the fine grained matrix of primitive meteorites, whose differences from the surrounding meteorite suggest that they are older than the solar system [Maria Lugaro (2005) Stardust from… …   Wikipedia

• Dieter Gruen — Dieter M. Gruen, an internationally respected innovator[peacock term], is a senior scientist in the Materials Science Division at Argonne National Laboratory. He received B.S. (1944, cum laude) and M.S. (1947) degrees in chemistry from… …   Wikipedia

• Uranus — This article is about the planet. For other uses, see Uranus (disambiguation). Uranus   …   Wikipedia

• Gehlenite — Infobox mineral name = Gehlenite category = , , boxwidth = boxbgcolor = imagesize = caption = formula = Ca2Al [AlSiO7] molweight = color = yellow brown, green grey, colourless habit = system = Tetragonal twinning = cleavage = Distinct/good… …   Wikipedia

• Cosmic dust — Space dust redirects here. For other uses, see Space dust (disambiguation). Porous chondrite interplanetary dust particle. Cosmic dust is a type of dust composed of particles in space which are a few molecules to 0.1 µm in size. Cosmic dust… …   Wikipedia

• Extraterrestrial materials — Most atoms on earth came from the interstellar dust and gas from which the sun and solar system formed. However, in the space science community extraterrestrial materials generally refers to objects now on earth that were solidified prior to… …   Wikipedia

• Supernova — This article is about the astronomical event. For other uses, see Supernova (disambiguation). Multiwavelength X ray, infrared, and optical compilation image of Kepler s supernova remnant, SN 1604. A supernova is a stellar explosion that is more… …   Wikipedia

• meteorite — meteoritic /mee tee euh rit ik/, meteoritical, meteorital /mee tee euh ruyt l/, adj. /mee tee euh ruyt /, n. 1. a mass of stone or metal that has reached the earth from outer space; a fallen meteoroid. 2. a meteoroid. [1815 25; METEOR + ITE1] * * …   Universalium

• P-nuclei — (p stands for proton rich) are certain proton rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s or r process. Contents 1 Definition 2 Origin of the p nuclei …   Wikipedia

• Xenon — (PronEng|ˈzɛnɒn [Xenon, entry in the Oxford English Dictionary, prepared by J. A. Simpson and E. S. C. Weiner, vol. 20, second edition, Oxford: Clarendon Press, 1989. ISBN 0 19 861232 X (vol. 20), ISBN 0 19 861186 2 (set.)] or IPAlink en|ˈziːnɒn… …   Wikipedia

• Natural abundance — In chemistry, natural abundance (NA) refers to the abundance of isotopes of a chemical element as naturally found on a planet. The relative atomic mass (a weighted average) of these isotopes is the atomic weight listed for the element in the… …   Wikipedia