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Chondrulelike objects in short-period comet 81P/Wild 2

, : Chondrulelike objects in short-period comet 81P/Wild 2. Science 321(5896): 1664-1667

The Stardust spacecraft returned cometary samples that contain crystalline material, but the origin of the material is not yet well understood. We found four crystalline particles from comet 81P/Wild 2 that were apparently formed by flash-melting at a high temperature and are texturally, mineralogically, and compositionally similar to chondrules. Chondrules are submillimeter particles that dominate chondrites and are believed to have formed in the inner solar nebula. The comet particles show oxygen isotope compositions similar to chondrules in carbonaceous chondrites that compose the middle-to-outer asteroid belt. The presence of the chondrulelike objects in the comet suggests that chondrules have been transported out to the cold outer solar nebula and spread widely over the early solar system.


PMID: 18801994

DOI: 10.1126/science.1160995

Other references

Granholm, N.H.; Johnson, P.M., 1978: Identification of eight-cell tw32 homozygous lethal mutants by aberrant compaction. Early cleavage stage (4- and uncompacted 8-cell) embryos from experimental (+/tw32 X +/t32) and control (male +/tw32 X female +/T) matings were recovered at 56 hours post coitum, cultured, separated into uncompacted and compacted 8-cell embryo gro...

Reali, A.P.; Penetra, R.G.; de Carvalho, M.E., 2001: Flotation technique with coagulant and polymer application applied to the post-treatment of effluents from anaerobic reactor treating sewage. This paper presents the results of a study performed with a lab-scale batch DAF unit fed with previously coagulated (with FeCl3 and/or cationic polymer) effluent from a pilot-scale expanded bed anaerobic reactor treating domestic sewage. The assoc...

Sheth, N.P., 2010: "The use of intraabdominal tissue expanders as a primary strategy for closure of giant omphalocele" by Drs Martin, Khan, Kim et al. Journal of Pediatric Surgery 45(6): 1384-5; Author Reply 1385

Grody Norman; Rosenfeld Simon; Basist Alan, 1998: Relationship between SSM/ I measurements and snow conditions. The Special Sensor Microwave Imager (SSM/I has been flown aboard DMSP satellites since 1987. Over land the SSM/I measurements at 19, 37 and 85 GHz are used to routinely identify precipitation, snow cover and the surface wetness resulting from rain...

Kujiraoka, M.; Ohgane, J.; Tanaka, S.; Shiota, K., 2002: Non-CpG methylation is found in CpG island of mouse citrate transport protein gene. Biology of Reproduction 66(Supplement 1): 250

Kraemer, K.; Markwitan, A.; Pallauf, J., 1993: Studies on the metabolism of metallothionein and alkaline phosphatase of adult rat primary hepatocyte cultures: Role of fetal calf serum and agonists of the phosphoinositide cascade. Adult rat primary hepatocytes maintained in DMEM/F12 (Ham) media were used as a model system for studying the role of fetal calf serum (FCS) and agonists of the phosphoinositide cascade in the metabolism of metallothionein (MT) and alkaline phosph...

Mandel, M.; Talamoni Fonoff, E.; Bor-Seng-Shu, E.; Teixeira, M.Jacobsen.; Chadi, G., 2013: Neurogenic neuroprotection: clinical perspectives. Neurogenic neuroprotection is a promising approach for treating patients with ischemic brain lesions. In rats, stimulation of the deep brain nuclei has been shown to reduce the volume of focal infarction. In this context, protection of neural tiss...

Lehnhardt, E.; Reinecke, M., 1968: Clinical evidence and electron-microscopical observation of the tumours of paraganglion tympanic glomus. Archiv für Klinische und Experimentelle Ohren- Nasen- und Kehlkopfheilkunde 190(4): 382-397

Namita Tripathy.; Dash, AP., 1988: Laboratory rearing of Mansonia annulifera (Theobald) using three indigenous plants. Unknown

Ravisse, P.; Reynaud, R.; Depoux, E.; Salles, P., 1959: On the first case of cryptococcosis to be discovered in French Equatorial Africa. This case, reported from the Institut Pasteur, Brazzaville, was of an African of 18 yr. who had just given birth to a still-born child. Death took place 5 weeks after the onset of the disease, and Cryptococcus neoformans was seen in and isolated f...