+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + NASA Center + Publication Year + Subject + Availability Options + Item/Media Type Selected Navigations: Author > Tsuchiyama, A. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 4 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Mineralogy, Three Dimensional Structure, and Oxygen Isotope Ratios of Four Crystalline Particles from Comet 81P/Wild 2 Author(s): Nakamura, T.; Noguchi, T.; Tsuchiyama, A.; Ushikubo, T.; Kita, N. T.; Valley, J. W.; Zolensky, M. E.; Kakazu, Y.; Sakamoto, K.; Mashio, E.; Uesugi, K.; Nakano, T. Abstract: Preliminary examinations of small dust particles from comet 82P/Wild 2 revealed many expected and unexpected features. Among them the most striking feature is the presence of abundant crystalline material in the comet. ... NASA Center: Johnson Space Center Publication Year: 2008 Added to NTRS: 2008-04-01 Document ID: 20080013324 Three-Dimensional Shapes and Impactor Size Estimation of Stardust Impact Author(s): Iida, Y.; Tsuchiyama, A.; Kadono, T.; Nakamura, T.; Sakamoto, K.; Nakano, T.; Uesugi, K.; Zolensky, M. E. Abstract: Impact tracks formed by cometary dust capture in silica aerogel collectors in the Stardust mission [1] have a variety of shapes, showing diversity of the cometary dust [2]. We have investigated 3-D structures and elemental ... NASA Center: Johnson Space Center Publication Year: 2008 Added to NTRS: 2008-04-01 Document ID: 20080009735 Collision of cometlike and slightly differentiated bodies as an origin for ordinary chondrites Author(s): Kitamura, M.; Tsuchiyama, A. Abstract: One of the keys to understanding the origins of chondrites is given by the characteristics of relict minerals in chondrules that survived chondrule formation. Some of the relic materials show shock deformation textures, such ... NASA Center: NASA (non Center Specific) Publication Year: 1994 Added to NTRS: 2004-11-03 Accession Number: 95N19308; Document ID: 19950012893 Establishment of redox conditions during planetary collisions as an origin of chondrites Author(s): Tsuchiyama, A.; Kitamura, M. Abstract: Collisions between a 'cometlike' body (mixtures of chondritic materials and ice) and a slightly differentiated body were proposed for shock origin of ordinary chondrites. In this model, chondrules were formed with shock ... NASA Center: NASA (non Center Specific) Publication Year: 1994 Added to NTRS: 2004-11-03 Accession Number: 95N19331; Document ID: 19950012916 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007