Download the AAS 2015 Annual Report

Total Page:16

File Type:pdf, Size:1020Kb

Download the AAS 2015 Annual Report AMERICAN ASTRONOMICAL SOCIETY 2015 ANNUAL REPORT A A S aas mission AND VISION statement The mission of the American Astronomical Society is to enhance and share humanity’s scientific understanding of the universe. 1. The Society, through its publications, disseminates and archives the results of astronomical research. The Society also communicates and explains our understanding of the universe to the public. 2. The Society facilitates and strengthens the interactions among members through professional meetings and other means. The Society supports member divisions representing specialized research and astronomical interests. 3. The Society represents the goals of its community of members to the nation and the world. The Society also works with other scientific and educational societies to promote the advancement of science. 4. The Society, through its members, trains, mentors and supports the next generation of astronomers. The Society supports and promotes increased participation of historically underrepresented groups in astronomy. A 5. The Society assists its members to develop their skills in the fields of education and public outreach at all levels. The Society promotes broad interest in astronomy, which enhances science literacy and leads many to careers in science and engineering. A Cover: Voyager 2 snapped this image of Neptune 25 years ago, in August 1989, as it flew past the 8th planet. [NASA/JPL] S 2015 annual report - contents 4 president’s mesSAGE 6 executive officer’s mesSAGE 8 FINANCIAL REPORT 10 MEMBERSHIP 12 CHARITABLE DONORS 14 PUBLISHING 15 PUBLIC POLICY 16 AAS & DIVISION MEETINGS 18 DIVISIONS, COMMITTEES & WORKINGA GROUPS 19 MEDIA RELATIONS 20 EDUCATION & OUTREACH A22 PRIZE WINNERS 23 MEMBER DEATHS Established in 1899, the American Astronomical Society (AAS) is the major organization of professional astronomers in North America. The membership also includes physicists, mathematicians, geologists, engineers and others whose research interests lie within the broad spectrum of subjects now comprising contemporary astronomy. AAS photos © 2015 Joson Images S PRESIDENT’S messaGE: C. Megan Urry This past year showed in AAS Code of Ethics. In place since 2010, the Code outlined multiple ways how the standards and expectations for professional behavior but was American Astronomical vague in places and more importantly, lacked any process for Society helps its members dealing with violations. The Task Force on the AAS Code of thrive within the profession Ethics began its work in late 2015 and, after incorporating and how its mission has substantial community input, will finalize the revised Code evolved over the past in 2016. few decades. 2015 was a year of upheaval. Highly The AAS has long worked toward greater equity and visible incidents around inclusion, thanks in large part to its “diversity committees” race and gender generated — in chronological order, the Committee on the Status much discussion among of Women in Astronomy (CSWA), the Committee on the astronomers. The Black Lives Status of Minorities in Astronomy (CSMA), the Sexual- Matter movement reminded us of the risks faced by some orientation and Gender Minorities in Astronomy committee and not others. Sexual harassment scandals in astronomy (SGMA, newly promoted from the WGLE working group and other disciplines reminded us that women and men still in 2015), and the new Working Group on Accessibility and experience the professional sphere differently. A primary AAS Disability (WGAD), which came together at the end of 2015. goal is to ensure a professional workplace in which everyone Volunteer members set the committees’ agendas, bring thrives—but it’s difficult to thrive if you are worried about issues forward to Council, promote best practices, and help being discriminated against or worse. make astronomy a welcoming profession for all. They were instrumental in organizing the Inclusive Astronomy meeting The publicity around sexual harassment prompted some to in June 2015, which was supported by the AAS and attended ask, “What’s wrong with astronomy?” The answer is that by its leadership. This innovative meeting reminded us of there is actually a lot right with astronomy. That people are the many ways in which people can feel excluded, as well willing to come forward with their stories is a sign that they as of the intrinsic and often unacknowledged privilege of feel safe to do so. Under the AAS anti-harassment policy those in the majority. Unconscious prejudices are natural — [aas.org/policies/anti-harassment-policy] at meetings, the they generally arise out of upbringing rather than conscious number of complaints is slowly rising, reflecting a wider malice — but they must be overcome, starting with bringing awareness and a changing culture. Officers of the AAS them into the light. The AAS will not rest until LGBTIQA* [aas.org/posts/news/2016/07/executive-office] have worked astronomers, those with disabilities, first-in-family college- diligently to address harassment. educated or PhD-educated astronomers, people of color, veterans, women, religious minorities, or any other minority There is inevitably a tension between support of groups, and especially those with multiple intersections of complainants and due process for the respondent, and difference, feel as welcome in astronomy as everyone else. between transparency and confidentiality. The Astronomy Allies program, started by two AAS members and run In October 2015 we held the first ever summit meeting of independently of the AAS, supports people who experience the AAS diversity committees, in conjunction with the annual harassment at astronomy meetings. This support is AAS Executive Committee and Divisional meetings at the unconditional — the Allies’ role is not to investigate but AAS Executive Office in Washington, DC. The purpose was to make sure the complainant is able to cope. Meanwhile, to set priorities for the coming year and to explore how the the AAS hired an experienced Human Resources consultant committees and AAS Council can work together to achieve to investigate complaints filed under our anti-harassment them. For example, committee members discussed their policy (and eventually, they will fill the same role with respect wish to broaden the CSWA site-visit program to include to our revised Code of Ethics policy). The investigation is SGMA, CSMA, WGAD, as invited by departments. Participants confidential to the greatest extent possible, and outcomes thought the Summit was very useful so we plan to repeat the are communicated only to the parties involved. Collectively, exercise in 2016. Council liaisons are also vital to keeping the these parallel tracks provide unequivocal support for those committees and the Council moving forward cooperatively. who need it and at the same time a fair process for anyone accused, without prior assumptions. Issues of inclusion were not always seen as part of the professional sphere. But today’s AAS plays a key role in making Because the behavior of astronomers was a key issue in astronomy open and inclusive, ideally independent of any 2015, the AAS formed a task force to take a fresh look at the social category. Here are two examples from 2015. First, with 4 leadership from the CSMA, we issued a detailed statement on the use of the Graduate Record Exam in graduate admissions, pointing out the potentially discriminatory consequences of using a fixed cutoff score. Second, AAS meetings staff, in consultation with interested members of the community, have worked to make our meetings ever more accessible. We still have some distance to go yet, but it’s a good start. The Council formed a Rapid Response Task Force to think about whether we should have a fast channel for addressing problems of great interest to AAS members — for example, a social media response to breaking news. There was no clear answer. There is clearly interest in having the Society speak quickly and reassuringly in difficult conditions. Sometimes this seems possible to do, other times less so, particularly when the issue is complex. The Council did feel strongly that it should make official statements that are lasting and that help create change within astronomy, addressing current events as needed and as a beginning rather than an end. The Council revised the AAS bylaws to have gender-neutral language. A couple of decades ago, recognizing that women in astronomy did not feel represented by the pronoun “he,” the AAS had changed its bylaws to replace “he” with “he or she.” Today we recognize that gender is not a simple binary state but a continuum. Accordingly, we replaced the The Journals Task Force finished its report and began the work pronouns “he or she” with the plural “they” where needed, of actually changing how our journals operate, simplifying or with the noun in question (as in: “The President will do X the submission of manuscripts and streamlining many other when the President wishes”). processes, and enhancing content. This is a major project, with big budget implications for the Society. As a non-profit, In order to include more voices in AAS governance, the our goal is to provide the highest impact journals, at low President created an Early Career Advisory Board of member cost to scientists and libraries. We believe the innovations volunteers, consisting of students, postdocs, teachers, and proposed by the Journals Task Force will help keep AAS new graduates doing astronomy or working in other sectors. Journals in the lead of astrophysics publishing. The idea was for the President to have frequent conversations with some of our most active younger members about These are changes — some small, some large — that make issues of concern. It has proved a valuable channel for a difference in the professional lives of astronomers. As a communication and education (both ways). Also, the AAS self-organized, self-governed professional society, the AAS Council changed bylaws to allow junior members to serve welcomes those who want change and encourages them to on AAS committees. (This change will become permanent bring their issues and ideas to the relevant committee and to following additional steps in the process of changing the the Council.
Recommended publications
  • Meteorites and the Origin of the Solar System
    Meteorites and the origin of the solar system STEPHEN G. BRUSH University of Maryland, College Park, MD 20742, USA (e-mail: [email protected]) Abstract: During the past two centuries, theories of the origin of the solar system have been strongly influenced by observations and theories about meteorites. I review this history up to about 1985. During the 19th century the hypothesis that planets formed by accretion of small solid particles ('the meteoritic hypothesis') competed with the alternative 'nebular hypothesis' of Laplace, based on condensation from a hot gas. At the beginning of the 20th century Chamberlin and Moulton revived the meteoritic hypothesis as the 'planetesimal hypothesis' and joined it to the assumption that the solar system evolved from the encounter of the Sun with a passing star. Later, the encounter hypothesis was rejected and the planetesimal hypothesis was incorporated into new versions of the nebular hypothesis. In the 1950s, meteorites provided essential data for the establishment by Patterson and others of the pre- sently accepted 4500 Ma age of the Earth and the solar system. Analysis of the Allende meteorite, which fell in 1969, inspired the 'supernova trigger' theory of the origin of the solar system, and furnished useful constraints on theories of planetary formation developed by Urey, Ringwood, Anders and others. Many of these theories assumed condensation from a homogeneous hot gas, an assumption that was challenged by astrophysical calculations. The meteoritic-planetesimal theory of planet formation was developed in Russia by Schmidt and later by Safronov. Wetherill, in the United States, established it as the preferred theory for formation of terrestrial planets.
    [Show full text]
  • General Disclaimer One Or More of the Following Statements May Affect
    General Disclaimer One or more of the Following Statements may affect this Document This document has been reproduced from the best copy furnished by the organizational source. It is being released in the interest of making available as much information as possible. This document may contain data, which exceeds the sheet parameters. It was furnished in this condition by the organizational source and is the best copy available. This document may contain tone-on-tone or color graphs, charts and/or pictures, which have been reproduced in black and white. This document is paginated as submitted by the original source. Portions of this document are not fully legible due to the historical nature of some of the material. However, it is the best reproduction available from the original submission. Produced by the NASA Center for Aerospace Information (CASI) j > COO-382-118 Aff CONDITIONS IN THE EARLY SOLAR SYSTEM, AS INFERRED FROM METEORITES Edward Anders Enrico Fermi Institute and Department of Chemistry University of Chicago, Chicago, Illinois 60637 Presented at 4 Nobel Symposium # 21 "From Plasma to Planet" 2526'2j?^^ Saltsjobaden, Sweden September 6-10, 1971 OCT 19> 1 =^ M R ECEIVED N 4 f -PUT epaq t ^^ll 0 ^ 6 °^ NASA Grant NGL 14-001-010 AEC Contract AT(11-1)-382 N7^38 RZa THRU) EFI-71-40 (ACCESSIONJU BE ) (CODE) O ^AGES (CATEGORY) a (NASA CR OR TMX OR AD NUMBER) 10 - 1 - CONDITIONS IN THE EARLY SOLAR SYSTEM, AS INFERRED FROM METEOR MS Edward Anders Enrico Fermi Institute and Department of Chemistry University of Chicago, Chicago, Illinois 60637 ABSTRACTm Many properties of meteoritek: suggest that they formed in a cooling gas of solar composition (solar nebula?).
    [Show full text]
  • FOREWORD Dorota Glowacka
    FOREWORD Dorota Glowacka Try to look. Just try and see. —Charlotte Delbo, None of Us Will Return Charlotte Delbo penned her memoir None of Us Will Return to commemorate 230 women with whom she had been trans- ported from Drancy to Auschwitz-Birkenau on 24 January 1943. As one of only forty-nine members of the convoy who had “returned,” most of them French political prisoners, Delbo made a commitment to preserve the memory of her martyred comrades. With the images of tortured and dying women in- delibly seared in her mind, her narrative is punctuated with the refrain, “Try to look. Just try and see” (Essayez de regarder. Essayez pour voir).1 Delbo’s compassionate desire to see trans- forms her descriptions of horror and humiliation into a work of mourning and into an injunction that those who come after bear witness to what happened to her friends. Nowhere has similar commitment to an ethics of testimo- nial gaze been expressed with more lucidity, eloquence, and passion than in On the Death of Jews. Straddling the boundary between historical inquiry and personal refl ection, this extraor- dinary text unfolds as a series of encounters with eponymic Holocaust photographs. Although only a small number of pho- tographs are reproduced here, Fresco provides evocative de- scriptions of many well-known images: synagogues and Torah scrolls burning on the night of Kristallnacht; deportations to the ghettos and the camps; and, fi nally, mass executions in the killing fi elds of Eastern Europe. The unique set of photographs included in On the Death of Jews shows groups of women and children from Liepaja (Liepa ¯ja), shortly before they were killed On the Death of Jews Photographs and History Nadine Fresco https://www.berghahnbooks.com/title/FrescoOn viii FOREWORD in December 1941 in the dunes of Shkede (Šk,e¯de) on the Baltic Sea.
    [Show full text]
  • Global Catastrophes in Earth History
    GLOBAL CATASTROPHES IN EARTH HISTORY An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality Snowbird, Utah October 20-23, 1988 N89-2 12E7 --?HEW- Sponsored by The Lunar and Planetary Institute and The National Academy of Sciences Abstracts Presented to the Topical Conference Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality Snowbird, Utah October 20 - 23,1988 Sponsored by Lunar and Planetary Institute and The National Academy of Sciences LPI Contribution No. 673 Compiled in 1988 Lunar and Planetary Institute Material in this volume may be copied without restraint for library, abstract service, educational, or personal research purposes; however, republication of any paper or portion thereof requires the written permission of the authors as well as appropriate acknowledgment of this publication. PREFACE This volume contains abstracts that have been accepted for presentation at the topical conference Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism and Mass Mortality. The Organizing Committee consisted of Robert Ginsburg, Chairman, University of Miami; Kevin Burke, Lunar and Planetary Institute; Lee M. Hunt, National Research Council; Digby McLaren, University of Ottawa; Thomas Simkin, National Museum of Natural History; Starley L. Thompson, National Center for Atmospheric Research; Karl K. Turekian, Yale University; George W. Wetherill, Carnegie Institution of Washington. Logistics and administrative support were provided by the Projects Ofice at the Lunar and Planetary Institute. This abstract volume was prepared by the Publications Office staff at the Lunar and Planetary Institute. The Lunar and Planetary Institute is operated by the Universities Space Research Association under contract No. NASW-4066 with the National Aeronautics and Space Administration.
    [Show full text]
  • Meteoritical Society
    Meteoritical Society http://meteoriticalsociety.org IN MEMORIAM JOHN KERRIDGE (1937–2013) John Kerridge passed away on March 25, a few weeks after his 76th birthday, losing his battle with mesothe- lioma. John was a fellow of the Meteoritical Society, and members remember him well for his service to the Society in initiating and then editing the fi rst volume of Meteorites and the Early Solar System (1988). In this impressive volume, John assembled the collective visions of 69 coauthors to assess the progress and dis- cuss options regarding the use of meteorite data in studying the environment and processes in the early solar nebula. He put emphasis on a requirement that solar nebular properties 2014 ANNUAL MEETING INVITATION must be placed in the appropriate astrophysical context, an issue that is still central in our research approaches a quarter of a century later. You are cordially invited to attend the 77th Annual Meeting of the Meteoritical Society, to be held on 7–13 September 2014, in Casablanca, John received his undergraduate degree in metallurgy from the University of Birmingham and obtained his PhD in crystallography at the University Morocco. Casablanca is Morocco’s largest city. Located in the northwest of London in 1968. Following graduation, John was a research associate at of Morocco on the Atlantic Ocean, Casablanca is known all over the NASA/Ames. Shortly thereafter, he joined the University of California, Los world. Besides being the economic capital of a fast-developing country, Angeles (UCLA), as a research geophysicist and later was appointed adjunct “Casa” is a prestigious center of art and architecture, showing a unique professor in the Department of Earth and Space Sciences (UCLA) and research blend of traditional Moorish architecture and Art Deco.
    [Show full text]
  • Download the AAS 2013 Annual Report
    AMERICAN ASTRONOMICAL SOCIETY 2013 ANNUAL REPORT A A S AAS MISSION AND VISION STATEMENT The mission of the American Astronomical Society is to enhance and share humanity’s scientific understanding of the universe. 1. The Society, through its publications, disseminates and archives the results of astronomical research. The Society also communicates and explains our understanding of the universe to the public. 2. The Society facilitates and strengthens the interactions among members through professional meetings and other means. The Society supports member divisions representing specialized research and astronomical interests. 3. The Society represents the goals of its community of members to the nation and the world. The Society also works with other scientific and educational societies to promote the advancement of science. 4. The Society, through its members, trains, mentors and supports the next generation of astronomers. The Society supports and promotes increased participation of historically underrepresented groups in astronomy. A 5. The Society assists its members to develop their skills in the fields of education and public outreach at all levels. The Society promotes broad interest in astronomy, which enhances science literacy and leads many to careers in science and engineering. A S 2013 ANNUAL REPORT - CONTENTS 4 PRESIDENT’S MESSAGE 5 EXECUTIVE OFFICER’S MESSAGE 6 FINANCIAL REPORT 8 MEMBERSHIP 10 CHARITABLE DONORS 12 PUBLISHING 13 PUBLIC POLICY 14 AAS & DIVISION MEETINGS 16 DIVISIONS, COMMITTEES & WORKINGA GROUPS 17 PRESS & MEDIA 18 EDUCATION & OUTREACH A20 PRIZE WINNERS 21 MEMBER DEATHS Established in 1899, the American Astronomical Society (AAS) is the major organization of professional astronomers in North America. The membership also includes physicists, mathematicians, geologists, engineers and others whose research interests lie within the broad spectrum of subjects now comprising contemporary astronomy.
    [Show full text]
  • Water on the Moon, I. Historical Overview Arlin Crotts (Columbia University)
    Water on The Moon, I. Historical Overview Arlin Crotts (Columbia University) By mid-19th century, astronomers strongly suspected that the Moon was largely dry and airless, based on the absence of any observable weather. [1] In 1892, William H. Pickering made a series of careful occultation measurements that allowed him to conclude that the lunar surface’s atmospheric pressure was less than 1/4000th of Earth’s. [2] Any number of strange ideas arose to contradict this, including Danish astronomer/mathematician Peter Andreas Hansen’s hypothesis, that the Moon’s center of mass is offset by its center of figure by 59 kilometers, meaning that one or two scale-heights of atmosphere could hide on the far side of the Moon, where it might support water oceans and life. [3] Hans Hörbiger’s 1894 Welteislehre (“World Ice”) theory, that the Moon and much of the cosmos is composed of water ice, became the favored cosmology of leaders of Third Reich Germany. [4] Respectable scientists realized that significant amounts of water on the Moon’s surface would rapidly sublime into the vacuum. [1] “The absence of any bodies of water on the moon is placed beyond doubt, both by actual telescopic examination and by inference from absence of clouds. There are no streams, lakes or seas. An eminent astronomer has remarked that the heat of the surface exposed to the sun would occasion a transfer of any water the moon might contain to its dark side, and that there may be frosts in this part, and perhaps running water near the margin of the illuminated portion.
    [Show full text]
  • Total War in the Fossil Record
    “A Hundred Million Hydrogen Bombs”: Total War in the Fossil Record Doug Davis Georgia Institute of Technology Doomsday Summer When Disney Studios threatened to destroy the world in the sum- mer of 1998, only NASA could save it. Blockbuster producer Jerry Bruckheimer took an old movie and made it new for Disney’s Ar- mageddon, strapping rocket engines on the Dirty Dozen and sending them on a suicide mission against the one foe left after the Cold War that could menace the entire continental United States—an asteroid “as big as Texas.” Bruckheimer hired a space-shuttle astronaut and NASA’s former director of advanced concepts to serve as the film’s scientific advisors, and Disney premiered the film at an exclusive gala at the Kennedy Space Center. Stars dined under the sublime ex- haust nozzles of a Saturn V before heading out to a specially de- signed theater to watch a crew of oil-platform roughnecks blow up an incoming “global killer” with nuclear weapons. NASA loved it. As the agency’s publicist crooned: “we sort of save the planet. We at NASA team up with the oil drillers for the good of the planet. That’s not fiction. That sort of thing NASA is known for: overcoming ob- stacles, teaming up together.”1 NASA, far from being an institution without a mission after the Cold War, got to play at being the first line of planetary defense. Armageddon’s producers may have wrapped their product in Big Science, but as numerous critics quickly pointed out, there is very 1.
    [Show full text]
  • Moving Stars and Shifting Sands of Presolar History
    PSR Discoveries: Hot Idea: Stardust in the Lab http://www.psrd.hawaii.edu/July97/Stardust.html posted July 8, 1997 Moving Stars and Shifting Sands of Presolar History Written by Donald D. Clayton Centennial Professor, Department of Physics and Astronomy Clemson University, Clemson, SC Many surprising things have been revealed by the presolar grains that scientists extract from meteorites. They are small (micrometer sized) mineral grains that existed in space, as part of clouds of interstellar dust, prior to the formation of our Sun and Solar System. What an astonishing discovery! These castoffs from ancient stars have been preserved within some types of meteorites making them available for close scrutiny in our laboratories. Analyses of these grains have led to better understanding of element formation, motions inside stars, and the migration of stars in the Milky Way Galaxy. This article describes a new view of the astronomical events in the Milky Way. It builds on a decade of detailed research by meteorite specialists, as summarized in a 1993 article by Edward Anders and Ernst Zinner. References: Clayton, Donald D., 1997, Placing the Sun and mainstream SiC particles in galactic chemodynamic evolution. Astrophysical Journal, vol. 484, p. L67- L70. Timmes, F. X. and D. D. Clayton, 1996, Galactic evolution of silicon isotopes: application to presolar SiC from meteorites. Astrophysical Journal, vol. 472, p. 723-741. Anders, E. and E. Zinner, 1993, Interstellar grains in primitive meteorites: diamond, silicon carbide, and graphite. Meteoritics, vol. 128, p. 490-514. When the Solar System formed by the collapse of a molecular cloud into the Sun and a dusty disk around it, small mineral grains were included.
    [Show full text]
  • Meteoritical Society 54Th Annual Meeting, Monterey, California, July
    METEORITICAL S·O·C·I·E·T·Y 54th ANNUAL MEETING Monterey, California, July 21-26, 1991 METEORITICAL S·O·C·I·E·T·Y 54th ANNUAL MEETING Monterey, California, July 21-26, 1991 PUBLIC SPONSORS CORPORATE SPONSORS San Jose State University Fisons Instruments Lunar and Planetary Institute CAMECA Instruments California Institute of Technology Charles Evans & Associates University of California at Berkeley Lawrence Livermore National Laboratory SPECIAL SPONSORS Institute of Geophysics and Planetary Physics Barringer Crater Company Center for Accelerator Mass Spectrometry Nuclear Chemistry Division OfHER SPONSORS NASA Exobiology Program Perkin Elmer Division of Planetary Sciences, AAS Fenestra Winery Commission on Comparative Planetology, IUGS California State University, Fullerton iii ORGANIZING COMMITTEE Members of the Organizing Committee were Edward Anders (Ex Officio; University of Chicago), T. E. Bunch (NASA Ames Research Center), Donald Burnett (California Institute of Technology), Mark Caffee (Lawrence Livermore National Laboratory), Patrick Cassen (NASA Ames Research Center), Sherwood Chang (NASA Ames Research Center), Peter Englert (Chair; San Jose State University), Sidney Niemeyer (Lawrence Livermore National Laboratory), Filippo Radicati di Brozolo (Charles Evans & Associates), John Reynolds (University of California at Berkeley), Gerald Wasserburg (California Institute of Technology), and Dorothy Woolum (California State University, Fullerton). PROGRAM COMMITTEE Members of the Program Committee were Daniel Britt (University of Arizona), Donald Burnett (Chair; California Institute of Technology), Mark Caffee (Lawrence Livermore National Laboratory), Patrick Cassen (NASA Ames Research Center), Sherwood Chang (NASA Ames Research Center), Peter Englert (San Jose State University), Julie Paque (Stanford University), John Reynolds (University of California at Berkeley), Ann Vickery (University of Arizona), and Dorothy Woolum (California State University, Fullerton).
    [Show full text]
  • The Proceedings of the Soviet-American Conference on the Cosmochemistry of the Moon and Planets
    METEORITIC MATERIAL ON THE MOON JOHN W. MORGAN, R. GANAPATHY, HIDEO HIGUCHI AND , EDWARD ANDERS 202 A Preprint of a Manuscript from THE PROCEEDINGS OF THE SOVIET-AMERICAN CONFERENCE ON THE COSMOCHEMISTRY OF THE MOON AND PLANETS (n HELD IN MOSCO W, USSR, ON JUNE 4-8, 1974 IU H Distributed by THE LUNAR SCIENCE INSTITUTE = t -& P HOUSTON, TEXAS 77058 ' = TO MAKE THE INFORMA TION CONTAINED HEREIN AS WIDEL Y AND AS RAPIDL Y AVAILABLE TO THE SCIENTIFIC COMMUNITY AS POSSIBLE. NASA EXPECTS TO PUBLISH THE ENGLISH-LANGUAGE VERSION OF THE PROCEEDINGS IN LA TE 1975. THE FINAL TEXT MA Y INCLUDE MINOR EDITORIAL CHANGES IN FORMA T. etc. JOHN H. POMEROY, NASA HEADQUARTERS TECHNICAL EDITOR METEORITIC MATERIAL ON THE MOON John W. Morgan, R. Ganapathy, Hideo Higuchi, and Edward Anders Enrico Fermi Institute and Department of Chemistry, University of Chicago Chicago, Illinois 60637 Abstract. Three types of meteoritic material are found on the Moon: micrometeorites, ancient planetesimal debris from the "early intense bombard- ment", and debris of recent, crater-forming projectiles. Their amounts and compositions have been determined from trace element studies. The micrometeorite component is uniformly distributed over the entire lunar surface, but is seen most clearly in mare soils. It has a primitive, Cl-chondrite-like composition, and comprises 1 to 1.5% of mature soils. Ap- parently it represents cometary debris. The mean annual influx rate is -9 -2 -1 2.4 x 10 g cm yr . It shows no detectable time variation or dependence on selenographic position. The ancient component is seen in highland breccias and soils more than 3.9 AE old.
    [Show full text]