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7 Planetary Rings Matthew S
7 Planetary Rings Matthew S. Tiscareno Center for Radiophysics and Space Research, Cornell University, Ithaca, NY, USA 1Introduction..................................................... 311 1.1 Orbital Elements ..................................................... 312 1.2 Roche Limits, Roche Lobes, and Roche Critical Densities .................... 313 1.3 Optical Depth ....................................................... 316 2 Rings by Planetary System .......................................... 317 2.1 The Rings of Jupiter ................................................... 317 2.2 The Rings of Saturn ................................................... 319 2.3 The Rings of Uranus .................................................. 320 2.4 The Rings of Neptune ................................................. 323 2.5 Unconfirmed Ring Systems ............................................. 324 2.5.1 Mars ............................................................... 324 2.5.2 Pluto ............................................................... 325 2.5.3 Rhea and Other Moons ................................................ 325 2.5.4 Exoplanets ........................................................... 327 3RingsbyType.................................................... 328 3.1 Dense Broad Disks ................................................... 328 3.1.1 Spiral Waves ......................................................... 329 3.1.2 Gap Edges and Moonlet Wakes .......................................... 333 3.1.3 Radial Structure ..................................................... -
Planetary Ring Systems Edited by Matthew S
Cambridge University Press 978-1-107-11382-4 — Planetary Ring Systems Edited by Matthew S. Tiscareno , Carl D. Murray Frontmatter More Information Planetary Ring Systems Properties, Structure, and Evolution Planetary rings are among the most intriguing structures of our solar system and have fas- cinated generations of astronomers. Collating emerging knowledge in the field, this volume reviews our current understanding of ring systems with reference to the rings of Saturn, Uranus, Neptune, and more. Written by leading experts, the history of ring research and the basics of ring-particle orbits is followed by a review of the known planetary ring sys- tems. All aspects of ring system science are described in detail, including specific dynamical processes, types of structures, thermal properties, their origins, and investigations using com- puter simulations and laboratory experiments. The concluding chapters discuss the prospects of future missions to planetary rings, the ways in which ring science informs and is informed by the study of other astrophysical disks, and a perspective on the field’s future. Researchers of all levels benefit from this thorough and engaging presentation. MATTHEW S. TISCARENO is a Senior Research Scientist at the SETI Institute, California. He is a Participating Scientist and an Imaging Team Associate with the Cassini- Huygens mission. His research output includes solar system dynamics and space-based observations of the outer solar system. CARL D. MURRAYis Professor of Mathematics and Astronomy at Queen Mary Univer- sity of London. He has contributed to numerous ring and moon discoveries as an original member of the Imaging Team with the Cassini-Huygens mission and he is co-author of the textbook Solar System Dynamics (1999). -
Annual Report Fy2016
ANNUAL REPORT FY2016 AFFILIATED WITH Affiliated with Cornell University PRI: WHO WE ARE Founded in 1932, the Paleontological Research Institution (PRI) pursues and integrates education and research, and interprets the history and systems of the Earth and its life. Our aim is to increase knowledge, educate society, and encourage wise stewardship of the Earth. PRI has two campuses and one large plot of forest property north of Ithaca, NY. Palmer Hall Museum of the Earth Named in honor of Katherine Palmer Opened in 2003, the Museum of the Earth (Director, 1952-1978), Palmer Hall is the is home to temporary and permanent Institution’s main building, housing PRI’s exhibitions that teach visitors about the collections, laboratories, library, and offices. history of life on Earth. Cayuga Nature Center Smith Woods The Cayuga Nature Center merged with Located in Trumansburg, NY, Smith Woods PRI in 2013. The Nature Center’s education is the largest plot of old-growth forest in programs and exhibitions focus on the central New York. More than 32 acres large, natural history of the Cayuga Lake basin, Smith Woods serves as a research and and are conducted in the Lodge and on the education resource for elementary through 120 acres of woodlands and fields on-site. graduate students. TABLE OF CONTENTS DIRECTOR’S AND PRESIDENT’S MESSAGE 2-3 PRI SERVES: 2016-2016 AT A GLANCE 4-5 RESEARCH 6-9 PUBLICATIONS 10-11 COLLECTIONS 12-13 EDUCATION 14-18 GRANTS 19 CORNELL UNIVERSITY RELATIONS 20-23 MUSEUM OF THE EARTH 24-25 CAYUGA NATURE CENTER 26-27 EXHIBITIONS 28-31 COMMUNITY ACCESSIBILITY 32-33 INTERNS AND VOLUNTEERS 34-35 DONOR SUPPORT 36-39 FINANCIAL ACTIVITY STATEMENT 40 BOARD OF TRUSTEES AND STAFF 41 FRONT COVER BACKGROUND IMAGE: Blue sky at the Cayuga Nature Center. -
Weighing Uranus' Moon Cressida with the Η Ring
The Astronomical Journal, 154:153 (8pp), 2017 October https://doi.org/10.3847/1538-3881/aa880e © 2017. The American Astronomical Society. All rights reserved. Weighing Uranus’ Moon Cressida with the η Ring Robert O. Chancia1 , Matthew M. Hedman1 , and Richard G. French2 1 Department of Physics, University of Idaho, Moscow, ID 83844-0903, USA; [email protected] 2 Astronomy Department, Wellesley College, Wellesley, MA 02481, USA Received 2017 June 19; revised 2017 August 9; accepted 2017 August 21; published 2017 September 20 Abstract The η ring is one of the narrow rings of Uranus, consisting of a dense core that is 1–2 km wide and a diffuse outer sheet spanning about 40 km. Its dense core lies just exterior to the 3:2 Inner Lindblad Resonance of the small moon Cressida. We fit the η ring radius residuals and longitudes from a complete set of both ground-based and Voyager stellar and radio occultations of the Uranian rings spanning 1977–2002. We find variations in the radial position of the η ring that are likely generated by this resonance, and take the form of a 3-lobed structure rotating at an angular rate equal to the mean motion of the moon Cressida. The amplitude of these radial oscillations is 0.667±0.113 km, which is consistent with the expected shape due to the perturbations from Cressida. The magnitude of these variations provides the first measurement of the mass and density of the moon Cressida (m =´()2.5 0.4 1017 kg and r =0.86 0.16 gcm−3) or, indeed, any of Uranus’ small inner moons. -
Smooth Talk Smooth Carol Horn Vintage
FASHION: s EYE: Ginnifer Goodwin becomes a romantic Natalia lead, page 4. Vodianova For more, see unveils WWD.com. lingerie, NEWS: Industry anxious as swim line, s Obama repositions China page 5. s trade policy, page 3. Women’s Wear Daily • The Retailers’ Daily Newspaper • February 9, 2009 • $3.00 WAccessories/Innerwear/LegwearwDMONdAY Smooth Talk Some lingerie designers like their luxury simple: easy, no-frills shapes in rich materials. Here, some examples: Chris Arlotta’s cashmere sweater, T-Luxury’s cotton and modal tank top for Anthropologie and Josie Natori’s silk tap shorts; necklace by Carol Horn vintage. For more, see pages 6 and 7. Forget Fashion Flash: Philo Rested and Ready For a Sensible Celine By Miles Socha PARIS — Phoebe Philo, one of the biggest fashion stars of her generation, is getting ready for her comeback after three years on the sidelines. And her first designs for Celine, to be unveiled in June for the pre-spring and cruise seasons, sound like they’re in tune with the times, underlining how much the industry has changed. Fireworks are out: Realism is in. “[Celine] RYAN TANIGUCHI USING TRESEMME; STYLED BY BOBBI QUEEN USING TRESEMME; STYLED BY TANIGUCHI RYAN never stood for flashy fashion. It always felt BY like it was pretty sober, and that feels really relevant,” Philo said in her first interview since taking the creative helm of the brand, owned by luxury giant LVMH Moët Hennessy Louis Vuitton. “It’s going to be more about a MIZU FOR SUSAN PRICE; HAIR foundation for a wardrobe.” BY See Back, Page8 PHOTO BY KYLE ERICKSEN; MODEL: AGNESA/RED; MAKEUP KYLE PHOTO BY 2 WWD, MONDAY, FEBRUARY 9, 2009 WWD.COM Christian Dior Sales Flat in ’08; Rtw, Luxe Bags On Growth Track WWDAccessories/Innerwear/LegwearMONDAY By Miles Socha said, disclosing that Dior bou- FASHION tiques in Palm Beach and Puerto Lingerie designers have a new energy for fall, PARIS — Christian Dior Couture Rico recently were shuttered. -
Arxiv:1509.00872V1 [Astro-Ph.EP] 2 Sep 2015 H Bevblt Fipcso in Xpaes H Oe Matc Impact Comet the Exoplanets
Detectability of Planetesimal Impacts on Giant Exoplanets Laura Flagga,b,∗, Alycia J. Weinbergerb, Keith Matthewsc aDepartment of Physics and Astronomy, Northern Arizona University, Flagstaff, AZ 86011-6010, USA bDepartment of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington, DC 20015, USA cCaltech Optical Observatories, California Institute of Technology, MC 301-17, Pasadena, CA 91125, USA Abstract The detectability of planetesimal impacts on imaged exoplanets can be measured using Jupiter during the 1994 comet Shoemaker-Levy 9 events as a proxy. By integrating the whole planet flux with and without impact spots, the effect of the impacts at wavelengths from 2 - 4 µm is revealed. Jupiter’s reflected light spectrum in the near-infrared is dominated by its methane opacity including a deep band at 2.3 µm. After the impact, sunlight that would have normally been absorbed by the large amount of methane in Jupiter’s atmosphere was instead reflected by the cometary material from the impacts. As a result, at 2.3 µm, where the planet would normally have low reflectivity, it brightened substantially and stayed brighter for at least a month. Keywords: comets, debris disks, extra-solar planets, Jupiter 1. Introduction The frequencies with which giant planets and cold circumstellar debris disks encircle old (i.e. >1 Gyr) Sun-like stars are both ∼20% (Eiroa et al. 2013; Marshall et al. 2014). The debris disks are generated in the collisions and evaporation of planetesimals, analogous to the comets and asteroids of today’s Solar System. That most debris disks contain cold, ∼50 K, dust indicates that the reservoirs of parent bodies are at ∼100 AU from the parent stars, in a region analogous to our Edgeworth-Kuiper Belt. -
Supporting Teachers in Complex Situations: Learning to Teach Evolution, Nature of Science, and Scientific In
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/266453623 Supporting Teachers in Complex Situations: Learning to Teach Evolution, Nature of Science, and Scientific In.... Article · January 2010 CITATION READS 1 93 5 authors, including: Barbara Crawford Daniel Capps The University of Georgia (Tbilisi) University of Georgia 52 PUBLICATIONS 2,512 CITATIONS 23 PUBLICATIONS 261 CITATIONS SEE PROFILE SEE PROFILE Robert M. Ross Paleontological Research Institution 64 PUBLICATIONS 265 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: geological time education View project citizen science View project All content following this page was uploaded by Barbara Crawford on 25 February 2015. The user has requested enhancement of the downloaded file. Supporting Teachers in Complex Situations: Learning to Teach Evolution, Nature of Science, and Scientific Inquiry Barbara A. Crawford, Daniel Capps, Xenia Meyer, Maya Patel Department of Education Cornell University Robert M. Ross, The Paleontological Research Institution Ithaca, New York Corresponding author: [email protected] Final paper can be downloaded at www.fossilfinders.org Abstract This paper describes the nature and influence of the first year of an innovative professional development project that engaged upper elementary and middle level science teachers in an authentic setting that crossed informal and formal boundaries. We view learning as situated and value the importance of authentic activities in classrooms. The main purpose of the project is to help teachers facilitate instruction for 5th through 9th grade children in complex situations that involve learning about evolutionary concepts, nature of science (NOS) and inquiry. -
Exploring the Origins and Evolution of Ice Giant Planets
Exp Astron DOI 10.1007/s10686-011-9251-4 ORIGINAL ARTICLE Uranus Pathfinder: exploring the origins and evolution of Ice Giant planets Christopher S. Arridge Craig B. Agnor Nicolas André Kevin H. Baines · · · · Leigh N. Fletcher Daniel Gautier Mark D. Hofstadter Geraint H. Jones · · · · Laurent Lamy Yves Langevin Olivier Mousis Nadine Nettelmann · · · · Christopher T. Russell Tom Stallard Matthew S. Tiscareno · · · Gabriel Tobie Andrew Bacon Chris Chaloner Michael Guest · · · · Steve Kemble Lisa Peacocke Nicholas Achilleos Thomas P. Andert · · · · Don Banfield Stas Barabash Mathieu Barthelemy Cesar Bertucci · · · · Pontus Brandt Baptiste Cecconi Supriya Chakrabarti Andy F. Cheng · · · · Ulrich Christensen Apostolos Christou Andrew J. Coates · · · Glyn Collinson John F. Cooper Regis Courtin Michele K. Dougherty · · · · Robert W. Ebert Marta Entradas Andrew N. Fazakerley · · · Jonathan J. Fortney Marina Galand Jaques Gustin Matthew Hedman · · · · Ravit Helled Pierre Henri Sebastien Hess Richard Holme · · · · Özgur Karatekin Norbert Krupp Jared Leisner Javier Martin-Torres · · · · Adam Masters Henrik Melin Steve Miller Ingo Müller-Wodarg · · · · Benoît Noyelles Chris Paranicas Imke de Pater Martin Pätzold · · · · Renée Prangé Eric Quémerais Elias Roussos Abigail M. Rymer · · · · Agustin Sánchez-Lavega Joachim Saur Kunio M. Sayanagi Paul Schenk · · · · Gerald Schubert Nick Sergis Frank Sohl Edward C. Sittler Jr. · · · · Nick A. Teanby Silvia Tellmann Elizabeth P. Turtle Sandrine Vinatier · · · · Jan-Erik Wahlund Philippe Zarka · Received: 26 November 2010 / Accepted: 21 July 2011 ©SpringerScience+BusinessMediaB.V.2011 N. Achilleos Department of Physics and Astronomy, University College London, London, UK C. B. Agnor School of Physics and Astronomy, Queen Mary University of London, London, UK T. P. Andert Universität der Bundeswehr, Munich, Germany N. André Centre d’Etude Spatiale des Rayonnements / CNRS, Toulouse, France C. -
Uranus, Neptune, Pluto, and the Outer Solar System Linda T
Uranus, Neptune, Pluto, and the Outer Solar System Linda T. Elkins-Tanton Uranus, Neptune, Pluto, and the Outer Solar System Copyright © 2006 by Linda T.Elkins-Tanton All rights reserved. No part of this book may be reproduced or utilized in any form or by any means, electronic or mechani- cal, including photocopying, recording, or by any information storage or retrieval systems, without permission in writing from the publisher. For information contact: Chelsea House An imprint of Infobase Publishing 132 West 31st Street New York NY 10001 Library of Congress Cataloging-in-Publication Data Elkins-Tanton, Linda T. Uranus, Neptune, Pluto, and the outer solar system / Linda T.Elkins-Tanton. p. cm. — (The Solar system) Includes bibliographical references and index. ISBN 0-8160-5197-6 (acid-free paper) 1. Uranus (Planet)—Popular works. 2. Neptune (Planet)—Popular works. 3. Pluto (Planet)—Popular works. 4. Solar system—Popular works. I.Title. QB681.E45 2006 523.47—dc22 2005014801 Chelsea House books are available at special discounts when purchased in bulk quantities for businesses, associations, institu- tions, or sales promotions. Please call our Special Sales Department in New York at (212) 967-8800 or (800) 322-8755. You can find Chelsea House on the World Wide Web at http://www.chelseahouse.com Text and cover design by Dorothy M. Preston Illustrations by Richard Garratt Printed in the United States of America VB Hermitage 10 9 8 7 6 5 4 3 2 1 This book is printed on acid-free paper. In memory of my brother Thomas Turner Elkins, who, when I was 10 years old, taught me about the Oort cloud, and together we named our pet mouse Oort. -
Places to Visit in and Around Ithaca
Places to Visit In and Around Ithaca Arts and Entertainment Cayuga Chamber Orchestra The Cayuga Chamber Orchestra is comprised of local professional musicians who give a number of performances throughout the sea- son. Concerts and events are held at various locations in Ithaca and sometimes feature internationally renowned soloists. ccoithaca.org Community School of Music and Arts (CSMA) CSMA is Ithaca’s downtown multi-arts center. Its historic location is a vibrant hub for instruction, production, and consumption of visual and performing arts. csma-ithaca.org The Hangar Theatre The Hanger Theatre produces five shows during its summer season, including full-scale musicals, comedies, dramas, and classics. Other smaller productions for families and younger audiences occur year- round. The theatre also offers workshops and programs for both children and adults. hangartheatre.org Taughannock Falls State Park Taughannock Park features gorges, cliffs, and waterfalls. The main The Kitchen Theatre Company waterfall has a 215-foot drop, making it 33 feet taller than Niagara The Kitchen Theatre Company produces classical and contemporary Falls. Visitors can walk the 3/4-mile trail to view the falls. The park plays and musicals. Its intimate venue seats only 99 patrons. The also offers camping, picnic areas, swimming, and fishing, as well as ice-skating, sledding, and cross-country skiing in the winter. theatre has strong ties to the Ithaca community and encourages the celebration of culture and the arts, especially in young people. taughannock.com kitchentheatre.org Other Parks Other parks to visit include Cass Park, Buttermilk Falls State Park, Outdoors Robert H. Treman State Park, and Stewart Park. -
“Signs of Sustainability” 2013
“Signs of Sustainability” 2013 Sustainable Tompkins, the premiere organization devoted to catalyzing sustainable development in our region, continually seeks the newest “Signs of Sustainability” in our community. We invite our community to keep watch through the year to spot individuals and organizations emerging on the local scene, all doing their part to help advance community sustainability. Sustainable Tompkins highlights these efforts to help these new activists “plug in” and connect with other similar endeavors. With all of us working together in different ways to resolve our shared sustainability challenges, we spur faster progress of this vital social movement. Join us in acknowledging the great work of this year’s “Signs of Sustainability” in our community! Sustainable Tompkins, 109 South Albany Street, Ithaca NY 14850 www.sustainabletompkins.org 2013 “Signs of Sustainability” Table of Contents Pages New Sustainable Enterprises 1-2 Energy Efficiency 1 Food Systems 1 Sustainable Community Development 1 Sustainable Enterprise 1-2 New Sustainability-Related Organizations 2-3 Food Systems 2 Renewable Energy 2 Social Activism 2 Sustainable Community Development 2-3 Sustainability Education 3 Sustainable Operations 3 New Sustainability Program by an Existing Business, Organization or Individual 4-31 Energy Efficiency 4 Food Systems 4-6 Green Building 6 Land Use 6-8 Planning and Policy 8-9 Recycling and Composting 10-11 Renewable Energy 11-12 Social Activism 12-14 Sustainable Community Development 14-18 Sustainability Education 18-27 -
Paleontological Skill and the Role of the Fossil Preparator
Methods in Preparation Proceedings of the First Annual Fossil Preparation and Collections Symposium Edited by Matthew A. Brown, John F. Kane, and William G. Parker Petrified Forest, 2009 ISBN 1-11111-111-1 All Copyrights retained by individual authors ©2009 Cover design by Matthew Brown. Main image: A newly opened field jacket in the preparation lab. TABLE OF CONTENTS PREFACE v Matthew Brown and William Parker FOREWARD vi Gregory Brown ARTICLES PREPARATION IN ACTION: PALEONTOLOGICAL SKILL AND 3 THE ROLE OF THE FOSSIL PREPARATOR Caitlin Wylie WORKING FOSSIL LABORATORIES AS PUBLIC EXHIBITIONS 13 Annette Gavigan DINOSAURS, MUSEUMS, AND THE MODERNIZATION OF AMERICAN 21 FOSSIL PREPARATION AT THE TURN OF THE 20TH CENTURY Paul Brinkman FOSSIL PREPARATION TEST: AN INDICATION OF MANUAL SKILLS 35 Lisa Bergwall MICROPREPARATION: ONE SAND GRAIN AT A TIME 41 Jean Pierre Cavigelli AN INTRODUCTION TO SOLUTION AND REACTION 53 ADHESIVES FOR FOSSIL PREPARATION Amy Davidson and Samantha Alderson ROTTEN WOOD IN SAND: DIFFICULT PREPARATION OF A LARGE 63 THEROPOD Anthony Maltese HISTOLOGICAL CORE DRILLING: A LESS DESTRUCTIVE 69 METHOD FOR STUDYING BONE HISTOLOGY Koen Stein and Martin Sander CREATING A MULTI-USE POLYURETHANE MOLD WITH A 81 REPLACEABLE POUR SPOUT Michael Cherney THE USE OF LINEAR COLLAPSIBLE FOAM FOR MOLDING ICHNOFOSSILS 87 IN THE FIELD Thomas Nolan, Rob Atkinson, and Bryan Small INEXPENSIVE AND SIMPLE CONSTRUCTION OF A MANUAL 93 CENTRIFUGE FOR RESIN CASTING Daniel Erickson PACKING METHODS FOR DOMESTIC AND INTERNATIONAL 97 FOSSIL SHIPPING ReBecca