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Ernst Zinner, Lithic Astronomer
UCLA UCLA Previously Published Works Title Ernst Zinner, lithic astronomer Permalink https://escholarship.org/uc/item/0gq43750 Journal Meteoritics & Planetary Science, 42(7/8) ISSN 1086-9379 Author Mckeegan, Kevin D. Publication Date 2007-07-01 Peer reviewed eScholarship.org Powered by the California Digital Library University of California Meteoritics & Planetary Science 42, Nr 7/8, 1045–1054 (2007) Abstract available online at http://meteoritics.org Ernst Zinner, lithic astronomer Kevin D. MCKEEGAN Department of Earth and Space Sciences, University of California, Los Angeles, Los Angeles, California 90095–1567, USA E-mail: [email protected] It is a rare privilege to be one of the founders of an entirely new field of science, and it is especially remarkable when that new field belongs to the oldest branch of “natural philosophy.” The nature of the stars has perplexed and fascinated humanity for millennia. While the sources of their luminosity and their structures and evolution were revealed over the last century, it is thanks to the pioneering efforts of a rare and remarkable man, Ernst Zinner, as well as his colleagues and students (mostly at the University of Chicago and at Washington University in Saint Louis), that in the last two decades it has become possible to literally hold a piece of a star in one’s hand. Armed with sophisticated microscopes and mass spectrometers of various sorts, these “lithic astronomers” are able to reveal stellar processes in exquisite detail by examining the chemical, mineralogical, and especially the nuclear properties of these microscopic grains of stardust. With this special issue of Meteoritics & Planetary Science, we honor Ernst Zinner (Fig. -
Martian Crater Morphology
ANALYSIS OF THE DEPTH-DIAMETER RELATIONSHIP OF MARTIAN CRATERS A Capstone Experience Thesis Presented by Jared Howenstine Completion Date: May 2006 Approved By: Professor M. Darby Dyar, Astronomy Professor Christopher Condit, Geology Professor Judith Young, Astronomy Abstract Title: Analysis of the Depth-Diameter Relationship of Martian Craters Author: Jared Howenstine, Astronomy Approved By: Judith Young, Astronomy Approved By: M. Darby Dyar, Astronomy Approved By: Christopher Condit, Geology CE Type: Departmental Honors Project Using a gridded version of maritan topography with the computer program Gridview, this project studied the depth-diameter relationship of martian impact craters. The work encompasses 361 profiles of impacts with diameters larger than 15 kilometers and is a continuation of work that was started at the Lunar and Planetary Institute in Houston, Texas under the guidance of Dr. Walter S. Keifer. Using the most ‘pristine,’ or deepest craters in the data a depth-diameter relationship was determined: d = 0.610D 0.327 , where d is the depth of the crater and D is the diameter of the crater, both in kilometers. This relationship can then be used to estimate the theoretical depth of any impact radius, and therefore can be used to estimate the pristine shape of the crater. With a depth-diameter ratio for a particular crater, the measured depth can then be compared to this theoretical value and an estimate of the amount of material within the crater, or fill, can then be calculated. The data includes 140 named impact craters, 3 basins, and 218 other impacts. The named data encompasses all named impact structures of greater than 100 kilometers in diameter. -
Origins of Life: Transition from Geochemistry to Biogeochemistry
December 2016 Volume 12, Number 6 ISSN 1811-5209 Origins of Life: Transition from Geochemistry to Biogeochemistry NITA SAHAI and HUSSEIN KADDOUR, Guest Editors Transition from Geochemistry to Biogeochemistry Staging Life: Warm Seltzer Ocean Incubating Life: Prebiotic Sources Foundation Stones to Life Prebiotic Metal-Organic Catalysts Protometabolism and Early Protocells pub_elements_oct16_1300&icpms_Mise en page 1 13-Sep-16 3:39 PM Page 1 Reproducibility High Resolution igh spatial H Resolution High mass The New Generation Ion Microprobe for Path-breaking Advances in Geoscience U-Pb dating in 91500 zircon, RF-plasma O- source Addressing the growing demand for small scale, high resolution, in situ isotopic measurements at high precision and productivity, CAMECA introduces the IMS 1300-HR³, successor of the internationally acclaimed IMS 1280-HR, and KLEORA which is derived from the IMS 1300-HR³ and is fully optimized for advanced U-Th-Pb mineral dating. • New high brightness RF-plasma ion source greatly improving spatial resolution, reproducibility and throughput • New automated sample loading system with motorized sample height adjustment, significantly increasing analysis precision, ease-of-use and productivity • New UV-light microscope for enhanced optical image resolution (developed by University of Wisconsin, USA) ... and more! Visit www.cameca.com or email [email protected] to request IMS 1300-HR³ and KLEORA product brochures. Laser-Ablation ICP-MS ~ now with CAMECA ~ The Attom ES provides speed and sensitivity optimized for the most demanding LA-ICP-MS applications. Corr. Pb 207-206 - U (238) Recent advances in laser ablation technology have improved signal 2SE error per sample - Pb (206) Combined samples 0.076121 +/- 0.002345 - Pb (207) to background ratios and washout times. -
Discoveries of Mass Independent Isotope Effects in the Solar System: Past, Present and Future Mark H
Reviews in Mineralogy & Geochemistry Vol. 86 pp. 35–95, 2021 2 Copyright © Mineralogical Society of America Discoveries of Mass Independent Isotope Effects in the Solar System: Past, Present and Future Mark H. Thiemens Department of Chemistry and Biochemistry University of California San Diego La Jolla, California 92093 USA [email protected] Mang Lin State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry, Chinese Academy of Sciences Guangzhou, Guangdong 510640 China University of Chinese Academy of Sciences Beijing 100049 China [email protected] THE BEGINNING OF ISOTOPES Discovery and chemical physics The history of the discovery of stable isotopes and later, their influence of chemical and physical phenomena originates in the 19th century with discovery of radioactivity by Becquerel in 1896 (Becquerel 1896a–g). The discovery catalyzed a range of studies in physics to develop an understanding of the nucleus and the properties influencing its stability and instability that give rise to various decay modes and associated energies. Rutherford and Soddy (1903) later suggested that radioactive change from different types of decay are linked to chemical change. Soddy later found that this is a general phenomenon and radioactive decay of different energies and types are linked to the same element. Soddy (1913) in his paper on intra-atomic charge pinpointed the observations as requiring the observations of the simultaneous character of chemical change from the same position in the periodic chart with radiative emissions required it to be of the same element (same proton number) but differing atomic weight. This is only energetically accommodated by a change in neutrons and it was this paper that the name “isotope” emerges. -
Geologic Mapping of Vinogradov Crater on Mars: Ancient Phyllosilicates to Alluvial Fans
45th Lunar and Planetary Science Conference (2014) 2382.pdf GEOLOGIC MAPPING OF VINOGRADOV CRATER ON MARS: ANCIENT PHYLLOSILICATES TO ALLUVIAL FANS. S. A. Wilson1, J. A. Grant1, C. M. Weitz2 and R. P. Irwin1 1Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 6th St. at Independence Ave. SW, Washington, DC, 20560 ([email protected]), 2Planetary Science Institute, 1700 E Fort Lowell, Suite 106, Tucson, AZ 85719. Introduction: Southern Margaritifer Terra on Mars preserves a long geologic history of water-related activity (Fig. 1). The northward-draining Uzboi– Ladon–Morava (ULM) outflow system dominates drainage in southwest Margaritifer Terra [1-4] and was incised during the Late Noachian to Hesperian [2]. Holden crater formed in the mid to Late Hesperian [5] and blocked the northern end of Uzboi, creating an enclosed basin that filled as a large paleolake [6]. The geology of Vinogradov crater and vicinity, located ~200 km west of Ladon basin and 250 km northwest of Holden crater (Fig. 1), is consistent with the long and diverse history of water in the region to the east [5]. Figure 2. Vinogradov crater is flanked by fan-bearing craters Roddy (D=85.8km; 21.7ºS, 320.6ºE), Gringauz (D=71.0km; 20.7ºS, 324.3ºE) and Luba (D=38.8km, 18.3ºS, 323ºE). Phyllosilicates are found in the depression (dashed line) between ejecta from Roddy and Gringauz (Fig. 3). MOLA 128 pixel/degree with 25 m contours over THEMIS daytime IR mosaic. Figure 1. Southern Margaritifer Terra indicating major place names. Stars show craters containing alluvial fans [7-8]. -
1968 Oct 8-10 Council Minutes
Minutes of the Council Meeting of the Meteoritical Society October 8, 1968 Hoffman Geological Laboratory Harvard University Cambridge The meeting was convened at 2:15 p.m. with President Carleton B. Moore presiding. In attendance were Vice Presidents Barandon Barringer, Robert S. Dietz and John A. O'Keefe, Secretary Roy S. Clarke, Jr., Treasurer Ursula B. Marvin, Editor Dorrit Hoffleit, Past President Peter M. Millman, and Councilors Richard Barringer, Kurt Fredriksson, Gerald S. Hawkins, Klaus Keil, Brian H. Mason and John A. Wood. Robin Brett, John T. Wasson and Fred L. Whipple attended the meeting as visitors. Minutes The minutes of the Council meeting held at the Holiday Inn, Mountain View California, on October 24, 1967, were approved as submitted. Program, 31st Annual Meeting Ursula Marvin presented the program for the Annual Meeting and discussed arrangements and last minute changes. The Council unanimously approved the program as presented and thanked Mrs. Marvin and her coworkers for their efforts on behalf of the Society. Secretary's Report The report of the Secretary was submitted to the Council in writing and was accepted as submitted (copy attached). There was brief discussion of the nomenclature problem of Barringer Meteor Crater. It was pointed out that in the final analysis usage determines the name that becomes accepted. It was suggested that Society members use the name Barringer Meteor Crater in speaking and writing and that we encourage others to do the same. No other action was suggested at this time. The problem of dues for foreign members was discussed, and several individuals suggested that funds are available to help in cases of demonstrated need. -
The Meteoritical Society Newsletter 2001
SUPPLEMENT TO METEORITICS & PLANETARY SCIENCE, VOL. 36, 11 The Meteoritical Society Newsletter (November 2001) A report of the business carried out by the Society over the past year, edited by Edward Scott, Secretary. PRESIDENT'S EDITORIAL Nomenclature President's Editorial Gero Kurat There are some indications that SNC meteorites could originate from Mars, there are others that relate them to carbonaceous Things usually turn out somewhat different from what one expects chondrites. Among the advocates for a martian origin is also the them to be and this was exactly so also with my first few months in foremost expert on these meteorites, Hap McSween. Some colleagues office. I was positively surprised by the amount of activities initiated neglect the possibility that SNC meteorites could not come from Mars by members of our Society. The overwhelmingly constructive and call them "martian meteorites". Others prefer to call them contributions make investing time for the Society a joy. There are, "SNICs", for obvious reasons. Hap has this year been honored for however, also some unsolved problems which do not create instant his work on "martian meteorites". As the possibility for a non-martian joy but whose solution eventually could lead to improvements origin of SNC meteorites still exists, a curious conundrum emerges: beneficial for all of us. So joy is awaiting us afterwards. Us means how could Hap have done this wonderful work on something that the Council and in particular the Secretary of the Society who does possibly does not exist? Please help us to solve that riddle—the best an excellent job in spite of the bumpy communication between our three solutions will receive prizes. -
Large Impact Crater Histories of Mars: the Effect of Different Model Crater Age Techniques ⇑ Stuart J
Icarus 225 (2013) 173–184 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus Large impact crater histories of Mars: The effect of different model crater age techniques ⇑ Stuart J. Robbins a, , Brian M. Hynek a,b, Robert J. Lillis c, William F. Bottke d a Laboratory for Atmospheric and Space Physics, 3665 Discovery Drive, University of Colorado, Boulder, CO 80309, United States b Department of Geological Sciences, 3665 Discovery Drive, University of Colorado, Boulder, CO 80309, United States c UC Berkeley Space Sciences Laboratory, 7 Gauss Way, Berkeley, CA 94720, United States d Southwest Research Institute and NASA Lunar Science Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, United States article info abstract Article history: Impact events that produce large craters primarily occurred early in the Solar System’s history because Received 25 June 2012 the largest bolides were remnants from planet ary formation .Determi ning when large impacts occurred Revised 6 February 2013 on a planetary surface such as Mars can yield clues to the flux of material in the early inner Solar System Accepted 25 March 2013 which, in turn, can constrain other planet ary processes such as the timing and magnitude of resur facing Available online 3 April 2013 and the history of the martian core dynamo. We have used a large, global planetary databas ein conjunc- tion with geomorpholog icmapping to identify craters superposed on the rims of 78 larger craters with Keywords: diameters D P 150 km on Mars, 78% of which have not been previously dated in this manner. -
2005 Leonard Medal for Joseph I. Goldstein
2005 Leonard Medal for Joseph I. Goldstein Item Type Article; text Authors Rubin, Alan Citation Rubin, A. (2005). 2005 Leonard Medal for Joseph I. Goldstein. Meteoritics & Planetary Science, 40(Supplement), A5-A6. DOI 10.1111/j.1945-5100.2005.tb00418.x Publisher The Meteoritical Society Journal Meteoritics & Planetary Science Rights Copyright © The Meteoritical Society Download date 01/10/2021 07:56:30 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/656695 Meteoritics & Planetary Science 40, Supplement, A5–A6 page (2005) Abstract available online at http://meteoritics.org Award 2005 Leonard Medal for Joseph I. Goldstein To tell the truth, I was a bit bewildered when I was assigned the task of giving the citation for Joe Goldstein for the Leonard Medal. Who was this guy? We had never worked in the same research group and had never published a paper together. I thought I had occasionally seen him in Houston at the Lunar and Planetary Science Conference, but never after Wednesday. I asked one of the postdocs in our group at UCLA who Goldstein was, but he had no idea. Now it began to make sense. Goldstein was just another Leonard medallist no one had ever heard of. I reasoned that he must be some Meteoritical Society apparatchik working his way through the ranks. This suspicion was confirmed when I found out that he is a former treasurer of the society and currently its vice- president—a man obviously being groomed for the top spot. So, to complete my assignment, I did what any modern investigator would do. -
The Prophecy That Is Shaping History
The Prophecy That Is Shaping History: New Research on Ezekiel’s Vision of the End Jon Mark Ruthven, PhD Ihab Griess, PhD Xulon Press 11350 Random Hills Drive #800 Fairfax, Virginia 22030 Copyright Jon Mark Ruthven © 2003 In memoriam Pamela Jessie Ruthven PhD, LCSW 26 March 1952 – 9 April 2001 Wife, mother, and faithful friend i Preface Great events in history often gather momentum and power long before they are recognized by the experts and commentators on world affairs. Easily one of the most neglected but powerfully galvanizing forces shaping history in the world today is the prophecy of Gog and Magog from the 38th and 39th chapters of the book of Ezekiel. This prophecy from the Jewish-Christian Bible has molded geo-politics, not only with- in the United States and the West but also, to an amazing degree, in the Muslim world as well. It seems that, millennia ago, Ezekiel’s vision actually named the nation which millions today believe plays the major role in this prophecy: the nation of Russia. Many modern scholars have dismissed Ezekiel’s Gog and Magog prophecy as a mystical apocalypse written to vindicate the ancient claims of a minor country’s deity. The very notion of such a prediction—that semi-mythical and unrelated nations that dwelt on the fringes of Israel’s geographical consciousness 2,500 years ago would, “in the latter days,” suddenly coalesce into a tidal wave of opposition to a newly regathered state of Jews—seems utterly incredible to a modern mentality. Such a scenario, the experts say, belongs only to the fundamentalist “pop religion” of The Late, Great Planet Earth and of TV evangelists. -
Oral History Whipple.Fm
Meteoritics & Planetary Science 39, Supplement, A199–A213 (2004) Abstract available online at http://meteoritics.org Report Oral histories in meteoritics and planetary science: XIII: Fred L. Whipple Ursula B. MARVIN Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA E-mail: [email protected] (Received 13 June 2004) Abstract–Born in Red Oak, Iowa, in 1906, Fred Lawrence Whipple earned his Ph.D. in astronomy at the University of California at Berkeley in 1931. He immediately accepted a position at the Harvard College Observatory and remained at Harvard throughout his career. In 1950, he was appointed to the Phillips Professorship in the Department of Astronomy, and in 1955, he began serving concurrently as the Director of the Smithsonian Astrophysical Observatory when it moved from Washington, D.C. to Cambridge, Massachusetts. In the 1930s, Whipple established the Harvard Meteor Project in which two cameras, 26 miles apart, simultaneously photographed the same meteors, for which he invariably derived elliptical orbits indicative of their origin within the solar system. In 1950, Whipple introduced his “dirty snowball” model of comet nuclei, which soon became widely accepted and was fully confirmed in 1986 by close-up images of comet Halley taken by the European Space Agency’s Giotto spacecraft. Keenly anticipating the orbiting of satellites during the International Geophysical Year (July 1, 1957-December 31, 1958), Whipple won contracts to build a worldwide network of telescopic cameras for satellite tracking. At least one of the cameras was ready in time to photograph the Soviet Union’s Sputnik I satellite in October 1957, and all 12 stations were in operation by midsummer of 1958. -
Peter Weiss. Andrei Platonov. Ragnvald Blix. Georg Henrik Von Wright. Adam Michnik
A quarterly scholarly journal and news magazine. March 2011. Vol IV:1 From the Centre for Baltic and East European Studies (CBEES) Södertörn University, Stockholm FEATURE. Steklov – Russian BALTIC temple of pure thought W O Rbalticworlds.com L D S COPING WITH TRANSITIONS PETER WEISS. ANDREI PLATONOV. RAGNVALD BLIX. GEORG HENRIK VON WRIGHT. ADAM MICHNIK. SLAVENKA DRAKULIĆ. Sixty pages BETRAYED GDR REVOLUTION? / EVERYDAY BELARUS / WAVE OF RELIGION IN ALBANIA / RUSSIAN FINANCIAL MARKETS 2short takes Memory and manipulation. Transliteration. Is anyone’s suffering more important than anyone else’s? Art and science – and then some “IF YOU WANT TO START a war, call me. Transliteration is both art and science CH I know all about how it's done”, says – and, in many cases, politics. Whether MÄ author Slavenka Drakulić with a touch царь should be written as tsar, tzar, ANNA of gallows humor during “Memory and czar, or csar may not be a particu- : H Manipulation: Religion as Politics in the larly sensitive political matter today, HOTO Balkans”, a symposium held in Lund, but the question of the transliteration P Sweden, on December 2, 2010. of the name of the current president This issue of the journal includes a of Belarus is exceedingly delicate. contribution from Drakulić (pp. 55–57) First, and perhaps most important: in which she claims that top-down gov- which name? Both the Belarusian ernance, which started the war, is also Аляксандр Лукашэнка, and the Rus- the path to reconciliation in the region. sian Александр Лукашенко are in use. Balkan experts attending the sympo- (And, while we’re at it, should that be sium agree that the war was directed Belarusian, or Belarussian, or Belaru- from the top, and that “top-down” is san, or Byelorussian, or Belorussian?) the key to understanding how the war BW does not want to take a stand on began in the region.