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Cross-References ASTEROID IMPACT Definition and Introduction History of Impact Cratering Studies
18 ASTEROID IMPACT Tedesco, E. F., Noah, P. V., Noah, M., and Price, S. D., 2002. The identification and confirmation of impact structures on supplemental IRAS minor planet survey. The Astronomical Earth were developed: (a) crater morphology, (b) geo- 123 – Journal, , 1056 1085. physical anomalies, (c) evidence for shock metamor- Tholen, D. J., and Barucci, M. A., 1989. Asteroid taxonomy. In Binzel, R. P., Gehrels, T., and Matthews, M. S. (eds.), phism, and (d) the presence of meteorites or geochemical Asteroids II. Tucson: University of Arizona Press, pp. 298–315. evidence for traces of the meteoritic projectile – of which Yeomans, D., and Baalke, R., 2009. Near Earth Object Program. only (c) and (d) can provide confirming evidence. Remote Available from World Wide Web: http://neo.jpl.nasa.gov/ sensing, including morphological observations, as well programs. as geophysical studies, cannot provide confirming evi- dence – which requires the study of actual rock samples. Cross-references Impacts influenced the geological and biological evolu- tion of our own planet; the best known example is the link Albedo between the 200-km-diameter Chicxulub impact structure Asteroid Impact Asteroid Impact Mitigation in Mexico and the Cretaceous-Tertiary boundary. Under- Asteroid Impact Prediction standing impact structures, their formation processes, Torino Scale and their consequences should be of interest not only to Earth and planetary scientists, but also to society in general. ASTEROID IMPACT History of impact cratering studies In the geological sciences, it has only recently been recog- Christian Koeberl nized how important the process of impact cratering is on Natural History Museum, Vienna, Austria a planetary scale. -
Winning the Salvo Competition Rebalancing America’S Air and Missile Defenses
WINNING THE SALVO COMPETITION REBALANCING AMERICA’S AIR AND MISSILE DEFENSES MARK GUNZINGER BRYAN CLARK WINNING THE SALVO COMPETITION REBALANCING AMERICA’S AIR AND MISSILE DEFENSES MARK GUNZINGER BRYAN CLARK 2016 ABOUT THE CENTER FOR STRATEGIC AND BUDGETARY ASSESSMENTS (CSBA) The Center for Strategic and Budgetary Assessments is an independent, nonpartisan policy research institute established to promote innovative thinking and debate about national security strategy and investment options. CSBA’s analysis focuses on key questions related to existing and emerging threats to U.S. national security, and its goal is to enable policymakers to make informed decisions on matters of strategy, security policy, and resource allocation. ©2016 Center for Strategic and Budgetary Assessments. All rights reserved. ABOUT THE AUTHORS Mark Gunzinger is a Senior Fellow at the Center for Strategic and Budgetary Assessments. Mr. Gunzinger has served as the Deputy Assistant Secretary of Defense for Forces Transformation and Resources. A retired Air Force Colonel and Command Pilot, he joined the Office of the Secretary of Defense in 2004. Mark was appointed to the Senior Executive Service and served as Principal Director of the Department’s central staff for the 2005–2006 Quadrennial Defense Review. Following the QDR, he served as Director for Defense Transformation, Force Planning and Resources on the National Security Council staff. Mr. Gunzinger holds an M.S. in National Security Strategy from the National War College, a Master of Airpower Art and Science degree from the School of Advanced Air and Space Studies, a Master of Public Administration from Central Michigan University, and a B.S. in chemistry from the United States Air Force Academy. -
Using a Nuclear Explosive Device for Planetary Defense Against an Incoming Asteroid
Georgetown University Law Center Scholarship @ GEORGETOWN LAW 2019 Exoatmospheric Plowshares: Using a Nuclear Explosive Device for Planetary Defense Against an Incoming Asteroid David A. Koplow Georgetown University Law Center, [email protected] This paper can be downloaded free of charge from: https://scholarship.law.georgetown.edu/facpub/2197 https://ssrn.com/abstract=3229382 UCLA Journal of International Law & Foreign Affairs, Spring 2019, Issue 1, 76. This open-access article is brought to you by the Georgetown Law Library. Posted with permission of the author. Follow this and additional works at: https://scholarship.law.georgetown.edu/facpub Part of the Air and Space Law Commons, International Law Commons, Law and Philosophy Commons, and the National Security Law Commons EXOATMOSPHERIC PLOWSHARES: USING A NUCLEAR EXPLOSIVE DEVICE FOR PLANETARY DEFENSE AGAINST AN INCOMING ASTEROID DavidA. Koplow* "They shall bear their swords into plowshares, and their spears into pruning hooks" Isaiah 2:4 ABSTRACT What should be done if we suddenly discover a large asteroid on a collision course with Earth? The consequences of an impact could be enormous-scientists believe thatsuch a strike 60 million years ago led to the extinction of the dinosaurs, and something ofsimilar magnitude could happen again. Although no such extraterrestrialthreat now looms on the horizon, astronomers concede that they cannot detect all the potentially hazardous * Professor of Law, Georgetown University Law Center. The author gratefully acknowledges the valuable comments from the following experts, colleagues and friends who reviewed prior drafts of this manuscript: Hope M. Babcock, Michael R. Cannon, Pierce Corden, Thomas Graham, Jr., Henry R. Hertzfeld, Edward M. -
Introduction to Astronomy from Darkness to Blazing Glory
Introduction to Astronomy From Darkness to Blazing Glory Published by JAS Educational Publications Copyright Pending 2010 JAS Educational Publications All rights reserved. Including the right of reproduction in whole or in part in any form. Second Edition Author: Jeffrey Wright Scott Photographs and Diagrams: Credit NASA, Jet Propulsion Laboratory, USGS, NOAA, Aames Research Center JAS Educational Publications 2601 Oakdale Road, H2 P.O. Box 197 Modesto California 95355 1-888-586-6252 Website: http://.Introastro.com Printing by Minuteman Press, Berkley, California ISBN 978-0-9827200-0-4 1 Introduction to Astronomy From Darkness to Blazing Glory The moon Titan is in the forefront with the moon Tethys behind it. These are two of many of Saturn’s moons Credit: Cassini Imaging Team, ISS, JPL, ESA, NASA 2 Introduction to Astronomy Contents in Brief Chapter 1: Astronomy Basics: Pages 1 – 6 Workbook Pages 1 - 2 Chapter 2: Time: Pages 7 - 10 Workbook Pages 3 - 4 Chapter 3: Solar System Overview: Pages 11 - 14 Workbook Pages 5 - 8 Chapter 4: Our Sun: Pages 15 - 20 Workbook Pages 9 - 16 Chapter 5: The Terrestrial Planets: Page 21 - 39 Workbook Pages 17 - 36 Mercury: Pages 22 - 23 Venus: Pages 24 - 25 Earth: Pages 25 - 34 Mars: Pages 34 - 39 Chapter 6: Outer, Dwarf and Exoplanets Pages: 41-54 Workbook Pages 37 - 48 Jupiter: Pages 41 - 42 Saturn: Pages 42 - 44 Uranus: Pages 44 - 45 Neptune: Pages 45 - 46 Dwarf Planets, Plutoids and Exoplanets: Pages 47 -54 3 Chapter 7: The Moons: Pages: 55 - 66 Workbook Pages 49 - 56 Chapter 8: Rocks and Ice: -
From the Heliosphere Into the Sun Programme Book Incuding All
511th WE-Heraeus-Seminar From the Heliosphere into the Sun –SailingagainsttheWind– Programme book incuding all abstracts Physikzentrum Bad Honnef, Germany January 31 – February 3, 2012 http://www.mps.mpg.de/meetings/heliocorona/ From the Heliosphere into the Sun A meeting dedicated to the progress of our understanding of the solar wind and the corona in the light of the upcoming Solar Orbiter mission This meeting is dedicated to the processes in the solar wind and corona in the light of the upcoming Solar Orbiter mission. Over the last three decades there has been astonishing progress in our understanding of the solar corona and the inner heliosphere driven by remote-sensing and in-situ observations. This period of time has seen the first high-resolution X-ray and EUV observations of the corona and the first detailed measurements of the ion and electron velocity distribution functions in the inner heliosphere. Today we know that we have to treat the corona and the wind as one single object, which calls for a mission that is fully designed to investigate the interwoven processes all the way from the solar surface to the heliosphere. The meeting will provide a forum to review the advances over the last decades, relate them to our current understanding and to discuss future directions. We will concentrate one day on in- situ observations and related models of the inner heliosphere, and spend another day on remote sensing observations and modeling of the corona – always with an eye on the symbiotic nature of the two. On the third day we will direct our view towards the future. -
Peter D. Ward – Curriculum Vitae Born May 12, 1949, Seattle Washington, USA Married, Two Children
1 Peter D. Ward – Curriculum Vitae Born May 12, 1949, Seattle Washington, USA Married, two children 1. Education B.S., 1971 Interdisciplinary Studies (Paleoecology), University of Washington, Seattle M.S., 1973 Geology, University of Washington, Seattle Ph.D., 1976 Geology, McMaster University, Hamilton, Ontario, Canada Employment 1976-1978 Assistant Professor, Department of Geology, Ohio State University 1978-1981 Assistant Professor, Department of Geology, University of California, Davis 1981-1983 Associate Professor with Tenure, Department of Geology and Division of Environmental Sciences, University of California, Davis 1982 Visiting Scientist, Laboratoire Arago (C.N.R.S.), Banyuls, France 1984 Professor, Department of Geology, University of California, Davis 1985 Associate Professor, University of Washington 1986 Professor, Department of Geological Sciences, and Adjunct Professor, Department of Zoology, University of Washington 1989- 1996 Curator of Invertebrate Paleontology, Thomas Burke Memorial Museum, University of Washington 1991. Visiting Scientist, South African Museum 1992-1996 Chairman and Head, Division of Geology and Paleontology, Thomas Burke Memorial Museum, University of Washington 2000. Visiting Scientist, South African Museum 2001 – present, Adjunct Professor, Department of Astronomy, University of Washington 2003- present, Professor, Dept. of Biology, and Professor, Department of Earth and Space Sciences, The University of Washington 2007- Adjunct Curator, Burke Museum of Natural History and Culture, University of -
Yosemite Falls from Near Base of Lower Fall —Ansel Adams Joseph S
,YOSEMITE NATURE NOTES VOLUME XXXI • NUMBER 7 JULY 19: Yosemite Falls from near Base of Lower Fall —Ansel Adams Joseph S. Dixon Cover Photo: Yosemite Falls from near Base of Lower Fall . By Ansel Adams from "My Cam, i in Yosemite Valley. " Reproduction by kind permission of Virginia Adams and Hough l, o Mifflin Company . THE MONTHLY PUBLICATION OF THE YOSEMITE NATURALIST DIVISION AND THE YOSEMITE NATURAL HISTORY ASSOCIATION, INC. P . Russell, Superintendent D . E . McHenry, Park Naturalist H . Hubbard, Assoc. Park Naturalist N . B . Herkenham, Asst. Park Naturalist I W . W . Bryant, Junior Park Naturalist OL. XXXI JULY, 1952 NO. 7 DEATH OF JOSEPH S. DIXON By Carl P. Russell, Park Superintendent n June 23, 1952, Joe Dixon passed national parks wildlife research ay at his home near Escondido, group . This was a unit set up with lifornia. Since the early years of the support of Mr . Wright's personal terpretive work in national parks, funds—the forerunner of the wildlife r. Dixon made many and varied branch of the National Park Service. ntributions to the success of the This private undertaking launched ogram. He is properly identified by Mr . Wright resulted in Mr . Dixon's a pioneer in park naturalist work, withdrawal from the Museum of pecially as a research specialist. Vertebrate Zoology and his subse- As a staff member of the Museum quent alignment with National Park Vertebrate Zoology, University of Service programs. When Mr. Wright lifornia, he assisted in the field moved his administrative and re- rk and the compilation of that search offices from Berkeley, Cali- ssic work, Animal Life in the Yo- fornia, to the National Park Service ite, 1924, which was produced by offices in Washington, D .C., Mr. -
Planetary Magnetospheres
CLBE001-ESS2E November 9, 2006 17:4 100-C 25-C 50-C 75-C C+M 50-C+M C+Y 50-C+Y M+Y 50-M+Y 100-M 25-M 50-M 75-M 100-Y 25-Y 50-Y 75-Y 100-K 25-K 25-19-19 50-K 50-40-40 75-K 75-64-64 Planetary Magnetospheres Margaret Galland Kivelson University of California Los Angeles, California Fran Bagenal University of Colorado, Boulder Boulder, Colorado CHAPTER 28 1. What is a Magnetosphere? 5. Dynamics 2. Types of Magnetospheres 6. Interaction with Moons 3. Planetary Magnetic Fields 7. Conclusions 4. Magnetospheric Plasmas 1. What is a Magnetosphere? planet’s magnetic field. Moreover, unmagnetized planets in the flowing solar wind carve out cavities whose properties The term magnetosphere was coined by T. Gold in 1959 are sufficiently similar to those of true magnetospheres to al- to describe the region above the ionosphere in which the low us to include them in this discussion. Moons embedded magnetic field of the Earth controls the motions of charged in the flowing plasma of a planetary magnetosphere create particles. The magnetic field traps low-energy plasma and interaction regions resembling those that surround unmag- forms the Van Allen belts, torus-shaped regions in which netized planets. If a moon is sufficiently strongly magne- high-energy ions and electrons (tens of keV and higher) tized, it may carve out a true magnetosphere completely drift around the Earth. The control of charged particles by contained within the magnetosphere of the planet. -
December 2002• Asstc Townsend Harris High School at Queens College 149-11 Melbourne Avenue, Flushing, NY 11 367 Art Show Focuses on Portraiture, Winter Scenes
Vol. 19,• No. 2. December 2002• asstc Townsend Harris High School at Queens College 149-11 Melbourne Avenue, Flushing, NY 11 367 Art show focuses on portraiture, winter scenes by Angela Hom from ceramics and paintings to com pressed in the show's title. amazing to visually see the various tal "Faces in the Snow," the first of two puter graphics, and relate to themes ex- "Carla and I wanted to combine por ents of the Townsend Harris students. art exhibitions planned traits and winter, so T hi s is never more evident than when for this year, opened creating thi s title was we hang the art show," said photogra after school on Mon very appro priate," phy teacher Marg heri ta Wischerth. day, December 16. Stu explained Bryan. A nthony M orales, a rt teac her, dents strol led around ''I'm very excited "commend[s] the students fo r the cre the lobby, taking in the about thi s art show," ative energy that they have exercised in art that was mounted on said Carla. "In previ the design and construction of the many black display boards, as ous years, we have vi sual compositions they have pro well as the free refresh had only a large duced." ments and live piano spring art show, but Invitations to the opening were mUSIC . thi s year, we' re hav mailed to Art Club alumni and various The show, set up by ing two large art museums. Lisa Mars, Assistant Princi the Art Club, features openings." pal of Foreign Languages and Fine Arts, "many exciting and new Fre s hman hopes the show will promote "respect :>, ideas," according to se .0 Christy Tomecek ex for creativity." 0 nior Bryan Kirschen, 0 pressed similar en She believes that this is a great op co-director along with a: thusiasm. -
Protecting the Crown: a Century of Resource Management in Glacier National Park
Protecting the Crown A Century of Resource Management in Glacier National Park Rocky Mountains Cooperative Ecosystem Studies Unit (RM-CESU) RM-CESU Cooperative Agreement H2380040001 (WASO) RM-CESU Task Agreement J1434080053 Theodore Catton, Principal Investigator University of Montana Department of History Missoula, Montana 59812 Diane Krahe, Researcher University of Montana Department of History Missoula, Montana 59812 Deirdre K. Shaw NPS Key Official and Curator Glacier National Park West Glacier, Montana 59936 June 2011 Table of Contents List of Maps and Photographs v Introduction: Protecting the Crown 1 Chapter 1: A Homeland and a Frontier 5 Chapter 2: A Reservoir of Nature 23 Chapter 3: A Complete Sanctuary 57 Chapter 4: A Vignette of Primitive America 103 Chapter 5: A Sustainable Ecosystem 179 Conclusion: Preserving Different Natures 245 Bibliography 249 Index 261 List of Maps and Photographs MAPS Glacier National Park 22 Threats to Glacier National Park 168 PHOTOGRAPHS Cover - hikers going to Grinnell Glacier, 1930s, HPC 001581 Introduction – Three buses on Going-to-the-Sun Road, 1937, GNPA 11829 1 1.1 Two Cultural Legacies – McDonald family, GNPA 64 5 1.2 Indian Use and Occupancy – unidentified couple by lake, GNPA 24 7 1.3 Scientific Exploration – George B. Grinnell, Web 12 1.4 New Forms of Resource Use – group with stringer of fish, GNPA 551 14 2.1 A Foundation in Law – ranger at check station, GNPA 2874 23 2.2 An Emphasis on Law Enforcement – two park employees on hotel porch, 1915 HPC 001037 25 2.3 Stocking the Park – men with dead mountain lions, GNPA 9199 31 2.4 Balancing Preservation and Use – road-building contractors, 1924, GNPA 304 40 2.5 Forest Protection – Half Moon Fire, 1929, GNPA 11818 45 2.6 Properties on Lake McDonald – cabin in Apgar, Web 54 3.1 A Background of Construction – gas shovel, GTSR, 1937, GNPA 11647 57 3.2 Wildlife Studies in the 1930s – George M. -
Lectures 6, 7 and 8 October 8, 10 and 13 the Heliosphere
ESSESS 77 LecturesLectures 6,6, 77 andand 88 OctoberOctober 8,8, 1010 andand 1313 TheThe HeliosphereHeliosphere The Exploding Sun • We have seen that at times the Sun explosively sends plasma into the surrounding space. • This occurs most dramatically during CMEs. The History of the Solar Wind • 1878 Becquerel (won Noble prize for his discovery of radioactivity) suggests particles from the Sun were responsible for aurora • 1892 Fitzgerald (famous Irish Mathematician) suggests corpuscular radiation (from flares) is responsible for magnetic storms The Sun’s Atmosphere Extends far into Space 2008 Image 1919 Negative The Sun’s Atmosphere Extends Far into Space • The image of the solar corona in the last slide was taken with a natural occulting disk – the moon’s shadow. • The moon’s shadow subtends the surface of the Sun. • That the Sun had a atmosphere that extends far into space has been know for centuries- we are actually seeing sunlight scattered off of electrons. A Solar Wind not a Stationary Atmosphere • The Earth’s atmosphere is stationary. The Sun’s atmosphere is not stable but is blown out into space as the solar wind filling the solar system and then some. • The first direct measurements of the solar wind were in the 1960’s but it had already been suggested in the early 1900s. – To explain a correlation between auroras and sunspots Birkeland [1908] suggested continuous particle emission from these spots. – Others suggested that particles were emitted from the Sun only during flares and that otherwise space was empty [Chapman and Ferraro, 1931]. Discovery of the Solar Wind • That it is continuously expelled as a wind (the solar wind) was realized when Biermann [1951] noticed that comet tails pointed away from the Sun even when the comet was moving away from the Sun. -
Gaia's Evil Twin: Is Life Its Own Worst Enemy? Page 1 of 5 Gaia's Evil Twin
Gaia's evil twin: Is life its own worst enemy? - life - 17 June 2009 - New Scientist Page 1 of 5 Home | Life | Environment | In-Depth Articles | Back to article Gaia's evil twin: Is life its own worst enemy? 17 June 2009 by Peter Ward Magazine issue 2713. Subscribe and save For similar stories, visit the Endangered Species and Evolution Topic Guides ADVERTISEMENT Interactive graphic: Medean extinctions throughout evolutionary history THE twin Viking landers that defied the odds to land on Mars in 1976 and 1977 had one primary goal: to find life. To the disappointment of nearly all concerned, the data they sent back was a sharp dash of cold water. The Martian surface was harsh and antibiotic and there was no sign of life. To two NASA scientists, James Lovelock and Dian Hitchcock, this came as no surprise - in fact, they would have been amazed to see Toxic gases and mass extinctions mean Earth isn't any evidence of life on Mars. A decade always life friendly (Image: Sarah Howell) before Viking, Lovelock and Hitchcock, both Enlarge image atmospheric scientists, had used observations of the Martian atmosphere to 1 more image deduce that there could be no life on the planet. From their research arose one of the most influential, ground-breaking scientific ideas of the 20th century - the Gaia hypothesis, named after the ancient Greek goddess of the Earth, a nurturing "mother" of life. But is it correct? New scientific findings suggest that the nature of life on Earth is not at all like Gaia. If we were to choose a mythical mother figure to characterise the biosphere, it would more accurately be Medea, the murderous wife of Jason of the Argonauts.