Innovation and Competitiveness: Keys to Our Nation's Prosperity
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Resource Letter OSE-1: Observing Solar Eclipses Jay M
Resource Letter OSE-1: Observing Solar Eclipses Jay M. PasachoffAndrew Fraknoi Citation: American Journal of Physics 85, 485 (2017); doi: 10.1119/1.4985062 View online: http://dx.doi.org/10.1119/1.4985062 View Table of Contents: http://aapt.scitation.org/toc/ajp/85/7 Published by the American Association of Physics Teachers RESOURCE LETTER Resource Letters are guides for college and university physicists, astronomers, and other scientists to literature, websites, and other teaching aids. Each Resource Letter focuses on a particular topic and is intended to help teachers improve course content in a specific field of physics or to introduce nonspecialists to this field. The Resource Letters Editorial Board meets annually to choose topics for which Resource Letters will be commissioned during the ensuing year. Items in the Resource Letter below are labeled with the letter E to indicate elementary level or material of general interest to persons seeking to become informed in the field, the letter I to indicate intermediate level or somewhat specialized material, or the letter A to indicate advanced or specialized material. No Resource Letter is meant to be exhaustive and complete; in time there may be more than one Resource Letter on a given subject. A complete list by field of all Resource Letters published to date is at the website <http://ajp.dickinson.edu/ Readers/resLetters.html>. Suggestions for future Resource Letters, including those of high pedagogical value, are welcome and should be sent to Professor Mario Belloni, Editor, AJP Resource Letters, Davidson College, Department of Physics, Box 6910, Davidson, NC 28035; e-mail: [email protected]. -
Lomonosov, the Discovery of Venus's Atmosphere, and Eighteenth Century Transits of Venus
Journal of Astronomical History and Heritage, 15(1), 3-14 (2012). LOMONOSOV, THE DISCOVERY OF VENUS'S ATMOSPHERE, AND EIGHTEENTH CENTURY TRANSITS OF VENUS Jay M. Pasachoff Hopkins Observatory, Williams College, Williamstown, Mass. 01267, USA. E-mail: [email protected] and William Sheehan 2105 SE 6th Avenue, Willmar, Minnesota 56201, USA. E-mail: [email protected] Abstract: The discovery of Venus's atmosphere has been widely attributed to the Russian academician M.V. Lomonosov from his observations of the 1761 transit of Venus from St. Petersburg. Other observers at the time also made observations that have been ascribed to the effects of the atmosphere of Venus. Though Venus does have an atmosphere one hundred times denser than the Earth’s and refracts sunlight so as to produce an ‘aureole’ around the planet’s disk when it is ingressing and egressing the solar limb, many eighteenth century observers also upheld the doctrine of cosmic pluralism: believing that the planets were inhabited, they had a preconceived bias for believing that the other planets must have atmospheres. A careful re-examination of several of the most important accounts of eighteenth century observers and comparisons with the observations of the nineteenth century and 2004 transits shows that Lomonosov inferred the existence of Venus’s atmosphere from observations related to the ‘black drop’, which has nothing to do with the atmosphere of Venus. Several observers of the eighteenth-century transits, includ- ing Chappe d’Auteroche, Bergman, and Wargentin in 1761 and Wales, Dymond, and Rittenhouse in 1769, may have made bona fide observations of the aureole produced by the atmosphere of Venus. -
Transit of Venus Presentation
http://sunearthday.nasa.gov/2012/transit/webcast.php Venus visible Venus with the unaided eye: "morning star" or the Earth "evening star. • Similar to Earth: – diameter: 12,103 km – 0.95 Earth’s – mass 0.89 of Earth's – few craters -- young surface – densities, chemical compositions are similar • rotation unusually slow (Venus day = 243 Earth days -- longer than Venus' year) • rotation retrograde • periods of Venus' rotation and of its orbit are synchronized -- always same face toward Earth when the two planets are at their closest approach • greenhouse effect -- surface temperature hot enough to melt lead M ikhail Lomonosov, june 5, 1761 discovered, during a transit, that V enus has an atmosphere The atmosphere is is composed mostly of carbon dioxide. There are several layers of clouds, many kilometers thick, composed of sulfuric acid. Mariner 10 Image of Venus V enera 13 Venus’ orbit is inclined (by 3.39 degrees) relative to the ecliptic If in the same plane we would have 5 transits in 8 years Venus: 13 years , Earth: 8 years Each time Earth completes 1.6 orbits, Venus catches up to it after 2.6 of its orbits Progress of the 2004 Transit of Venus pictured from NASA's Soho solar observatory. Credit: NASA Ascending (A) or Duration since last transit Date of transit Descending (D) node (years and months) 6 December 1631 A 4 December 1639 A 8 yrs 6 June 1761 D 121 yrs 6 months 3 June 1769 D 8 yrs 9 December 1874 A 105 yrs 6 months 6 December 1882 A 8 yrs 8 June 2004 D 121 yrs 6 months 5 June 2012 D 8 yrs 11 December 2117 A 105 yrs 6 months 8 December 2125 A 8 yrs In 6000 years 81 transits only Venus’ Role in History Copernican System vs Ptolemaic System http://astro.unl.edu/classaction/animations/renaissance/venusphases.html Venus’ Role in History Size of the Solar System - Revealed! • Kepler predicted the transit of December 1631 (though not observed!) and 120 year cycle. -
Expedition Measures Solar Motions Seen During Last Summer's Total Solar Eclipse 7 June 2018
Expedition measures solar motions seen during last summer's total solar eclipse 7 June 2018 "During the August 21, 2017, solar eclipse, our hidden behind the blue sky. "Only at a total solar dozens of telescopes and electronic cameras eclipse, when the blue sky goes away because collected data during the rare two minutes at which normal sunlight is hidden by the moon, can we see we could see and study the sun's outer the corona at all this well. And because the sun's atmosphere, the corona," reported solar- magnetic field changes over the 11-year sunspot astronomer Jay Pasachoff to the American cycle and erratically as well, each time we look at Astronomical Society, meeting in Denver during the corona—even when we get only a couple of June 4-7. Pasachoff, Field Memorial Professor of minutes to see it every couple of years somewhere Astronomy at Williams College, discussed results in the world—we have a new sun to study, just as a from his team's observations made in Salem, cardiologist-researcher who looked inside Oregon, and measurements that his team has someone's heart in, say, Africa two years ago for a made of extremely rapid motions in the corona. couple of minutes would still have lots to learn by looking at a new patient in the U.S. a couple of "We could see giant streamers coming out of low years later." solar latitudes as well as plumes out of the sun's north and south poles, all held in their beautiful "We are learning about the sun's influence on the shapes by the sun's magnetic field," he said. -
GENERAL MEETING NORMAN SLEEP, Ph.D. Professor Of
Vol. 63, No. 10 – October 2015 GENERAL MEETING THE PRESIDIO . OBSERVATION POST . BUILDING 211 211 Lincoln Boulevard, San Francisco 7:00 pm Doors Open . 7:30 pm Announcements . 8:00 pm Speaker SFAA’s General Meetings occur on the 3rd TUESDAY of each month (except January) October 20, 2015 NORMAN SLEEP, Ph.D. Professor of Geophysics, Stanford University OUR MOON FROM FORMATION TO ASTEROID TARGET: MESSAGE FOR LIFE ON EARTH The present EarthMoon system formed in the aftermath of the impact of a Mars sized body on our planet. The Earth was then mostly melted and the Moon accreted from a ring of vapor and liquid orbiting the Earth. Part of the impactor’s core ended up in the Moonforming disk around the Earth. Iron metal within the disk was partly oxidized by ferric iron and water. Metallic iron remained and this formed our Moon’s small core, and about 2% of the impactor’s core ended up within Earth’s mantle. It is conceivable that early asteroid bombardment on the Earth was relatively benign and that planet sterilizing impact never occurred. A dense CO2 atmosphere blanketed Earth within about 10 million years of the impact, and a solarheated greenhouse maintained 200 degrees C temperatures at the surface. Earth did not become habitable until the CO2 subducted into the mantle. Subducted oceanic crust carried carbonates into the mantle, which partially melted beneath island arcs to form alkaline CO2rich lavas. Groundwaters within these lavas are an attractive prebiotic environment. By the time of Earth’s earliest sedimentary record at about 3.8 billion years ago, the surface was clement, the ocean was near its current pH about 8, and the CO2 pressure in the air was comparable to the modern value. -
NL#132 October
October 2006 Issue 132 AAS NEWSLETTER A Publication for the members of the American Astronomical Society PRESIDENT’S COLUMN J. Craig Wheeler, [email protected] August is a time astronomers devote to travel, meetings, and writing papers. This year, our routine is set 4-5 against the background of sad and frustrating wars and new terror alerts that have rendered our shampoo Calgary Meeting suspect. I hope that by the time this is published there is a return to what passes for normalcy and some Highlights glimmer of reason for optimism. In this summer season, the business of the Society, while rarely urgent, moves on. The new administration 6 under Executive Officer Kevin Marvel has smoothly taken over operations in the Washington office. The AAS Final transition to a new Editor-in-Chief of the Astrophysical Journal, Ethan Vishniac, has proceeded well, with Election some expectation that the full handover will begin earlier than previously planned. Slate The Society, under the aegis of the Executive Committee, has endorsed the efforts of Senators Mikulksi and Hutchison to secure $1B in emergency funding for NASA to make up for some of the costs of shuttle 6 return to flight and losses associated with hurricane Katrina. It remains to be seen whether this action 2007 AAS will survive the budget process. The Executive Committee has also endorsed a letter from the American Renewals Institute of Physics supporting educators in Ohio who are fending off an effort there to include intelligent design in the curriculum. 13 Interestingly, the primary in Connecticut was of relevance to the Society. -
PDF Program Book
46th Meeting of the Division for Planetary Sciences with Historical Astronomy Division (HAD) 9-14 November 2014 | Tucson, AZ OFFICERS AND MEMBERS ........ 2 SPONSORS ............................... 2 EXHIBITORS .............................. 3 FLOOR PLANS ........................... 5 ATTENDEE SERVICES ................. 8 Session Numbering Key SCHEDULE AT-A-GLANCE ........ 10 100s Monday 200s Tuesday SUNDAY ................................. 20 300s Wednesday 400s Thursday MONDAY ................................ 23 500s Friday TUESDAY ................................ 44 Sessions are numbered in the program book by day and time. WEDNESDAY .......................... 75 All posters will be on display Monday - Friday THURSDAY.............................. 85 FRIDAY ................................. 119 Changes after 1 October are included only in the online program materials. AUTHORS INDEX .................. 137 1 DPS OFFICERS AND MEMBERS Current DPS Officers Heidi Hammel Chair Bonnie Buratti Vice-Chair Athena Coustenis Secretary Andrew Rivkin Treasurer Nick Schneider Education and Public Outreach Officer Vishnu Reddy Press Officer Current DPS Committee Members Rosaly Lopes Term Expires November 2014 Robert Pappalardo Term Expires November 2014 Ralph McNutt Term Expires November 2014 Ross Beyer Term Expires November 2015 Paul Withers Term Expires November 2015 Julie Castillo-Rogez Term Expires October 2016 Jani Radebaugh Term Expires October 2016 SPONSORS 2 EXHIBITORS Platinum Exhibitor Silver Exhibitors 3 EXHIBIT BOOTH ASSIGNMENTS 206 Applied -
Ed 303 318 Author Title Institution Report No Pub
DOCUMENT RESUME ED 303 318 SE 050 265 AUTHOR Druger, Marvin, Ed. TITLE Science for the Fun of It. A Guide to Informal Science Education. INSTITUTION National Science Teachers Association, Washington, D.C. REPORT NO ISBN-0-87355-074-9 PUB DATE 88 NOTE 137p.; Photographs may not reproduce well. AVAILABLE FROMNational Science Teachers Association, 1742 Connecticut Avenue, NW, Washington, DC 20009 ($15.00, 10% discount on 10 or more). PUB TYPE Collected Works - General (020) -- Books (010) -- Guides - Non-Classroom Use (055) EDRS PRICE MF01 Plus Postage. PC Not Available from EDRS. DESCRIPTORS Educational Facilities; Educational Innovation; Educational Media; Educational Opportunities; Educational Television; *Elementary School Science; Elementary Secondary Education; *Mass Media; *Museums; *Nonformal Education; Periodicals; Program Descriptions; Science Education; *Secondary School Science; *Zoos ABSTRACT School provides only a small part of a child's total education. This book focuses on science learning outside of the classroom. It consists of a collection of articles written by people who are involved with sevaral types of informal science education. The value of informal science education extends beyond the mere acquisition of knowledge. Attitudes toward science can be greatly influenced by science experiences outside of the classroom. The intent of this book is to highlight some of the many out-of-school opportunities which exist including zoos, museums, television, magazines and books, and a variety of creative programs and projects. The 19 articles in this volume are organized into four major sections entitled: (1) "Strategies"; (2) "The Media"; (3) "Museums and Zoos"; and (4) "Projects, Coop2titions, and Family Activities." A bibliography of 32 references on these topies is included. -
Transit of Venus Sheet Music
Transit Of Venus Sheet Music Download transit of venus sheet music pdf now available in our library. We give you 6 pages partial preview of transit of venus sheet music that you can try for free. This music notes has been read 2608 times and last read at 2021-09-29 10:00:19. In order to continue read the entire sheet music of transit of venus you need to signup, download music sheet notes in pdf format also available for offline reading. Ensemble: Concert Band Level: Advanced [ READ SHEET MUSIC ] Other Sheet Music Transit Of Venus March Brass Band Edition Transit Of Venus March Brass Band Edition sheet music has been read 6238 times. Transit of venus march brass band edition arrangement is for Intermediate level. The music notes has 6 preview and last read at 2021-09-29 10:32:17. [ Read More ] Transit Of Venus For Trombone Or Low Brass Quartet Transit Of Venus For Trombone Or Low Brass Quartet sheet music has been read 3158 times. Transit of venus for trombone or low brass quartet arrangement is for Intermediate level. The music notes has 6 preview and last read at 2021-09-29 04:50:40. [ Read More ] Transit Of Venus For Solo Flute Transit Of Venus For Solo Flute sheet music has been read 6876 times. Transit of venus for solo flute arrangement is for Advanced level. The music notes has 2 preview and last read at 2021-09-29 21:39:27. [ Read More ] In Transit Blues In Transit Blues sheet music has been read 2916 times. -
Transit of Venus M
National Aeronautics and Space Administration The Transit of Venus June 5/6, 2012 HD209458b (HST) The Transit of Venus June 5/6, 2012 Transit of Venus Mathof Venus Transit Top Row – Left image - Photo taken at the US Naval Math Puzzler 3 - The duration of the transit depends Observatory of the 1882 transit of Venus. Middle on the relative speeds between the fast-moving image - The cover of Harpers Weekly for 1882 Venus in its orbit and the slower-moving Earth in its showing children watching the transit of Venus. orbit. This speed difference is known to be 5.24 km/sec. If the June 5, 2012, transit lasts 24,000 Right image – Image from NASA's TRACE satellite seconds, during which time the planet moves an of the transit of Venus, June 8, 2004. angular distance of 0.17 degrees across the sun as Middle - Geometric sketches of the transit of Venus viewed from Earth, what distance between Earth and by James Ferguson on June 6, 1761 showing the Venus allows the distance traveled by Venus along its shift in the transit chords depending on the orbit to subtend the observed angle? observer's location on Earth. The parallax angle is related to the distance between Earth and Venus. Determining the Astronomical Unit Bottom – Left image - NOAA GOES-12 satellite x-ray image showing the Transit of Venus 2004. Middle Based on the calculations of Nicolas Copernicus and image – An observer of the 2004 transit of Venus Johannes Kepler, the distances of the known planets wearing NASA’s Sun-Earth Day solar glasses for from the sun could be given rather precisely in terms safe viewing. -
POV's Discussion Guide
POV Community Engagement & Education DISCUSSION GUIDE The City Dark A Film by Ian Cheney www.pbs.org/pov LETTER FROM THE FILMMAKER When I set out to make a film about light pollution, I knew nothing about bird migration or melatonin; I just knew I missed seeing the stars. I spent a lot of my childhood in rural Maine, where I fell in love with the night sky. From an early age, I sought to capture it on film. I experimented with long nighttime exposures using Dad’s old indestructible Pentax K1000, a simple cable-release and an unforgivable amount of Kodak Gold film. I was lucky to get one decent shot per roll. But under count - less Maine summer night skies, I succeeded in becoming something of an amateur as - tronomer, eventually attending teen astronomy camp and building my own telescope out of an old cardboard construction tube. Years later, in 2008, working as a documentary filmmaker under New York’s neon skies, I stumbled upon a curious statistic: For the first time in history, more than half of the world’s population was now living in urban areas. As a species, we’d gradually moved from countryside to city. What struck a chord was the parallel with my own life, my own progression from dark, starry skies to the brilliant, hazy skyline of America’s largest city. There was no denying I’d gained a lot since coming to New York—but what had I lost? And what might we all be losing? Some three years later, I’d talked to astronomers, biologists, ecologists, wildlife veteri - narians, criminologists, lighting designers and Boy Scouts about the myriad ways that ar - tificial light affects our world. -
This Is an Electronic Reprint of the Original Article. This Reprint May Differ from the Original in Pagination and Typographic Detail
This is an electronic reprint of the original article. This reprint may differ from the original in pagination and typographic detail. Author(s): Sterken, Christiaan; Aspaas, Per Pippin; Dunér, David; Kontler, László; Neul, Reinhard; Pekonen, Osmo; Posch, Thomas Title: A voyage to Vardø - A scientific account of an unscientific expedition Year: 2013 Version: Please cite the original version: Sterken, C., Aspaas, P. P., Dunér, D., Kontler, L., Neul, R., Pekonen, O., & Posch, T. (2013). A voyage to Vardø - A scientific account of an unscientific expedition. The Journal of Astronomical Data, 19(1), 203-232. http://www.vub.ac.be/STER/JAD/JAD19/jad19.htm All material supplied via JYX is protected by copyright and other intellectual property rights, and duplication or sale of all or part of any of the repository collections is not permitted, except that material may be duplicated by you for your research use or educational purposes in electronic or print form. You must obtain permission for any other use. Electronic or print copies may not be offered, whether for sale or otherwise to anyone who is not an authorised user. MEETING VENUS C. Sterken, P. P. Aspaas (Eds.) The Journal of Astronomical Data 19, 1, 2013 A Voyage to Vardø. A Scientific Account of an Unscientific Expedition Christiaan Sterken1, Per Pippin Aspaas,2 David Dun´er,3,4 L´aszl´oKontler,5 Reinhard Neul,6 Osmo Pekonen,7 and Thomas Posch8 1Vrije Universiteit Brussel, Brussels, Belgium 2University of Tromsø, Norway 3History of Science and Ideas, Lund University, Sweden 4Centre for Cognitive Semiotics, Lund University, Sweden 5Central European University, Budapest, Hungary 6Robert Bosch GmbH, Stuttgart, Germany 7University of Jyv¨askyl¨a, Finland 8Institut f¨ur Astronomie, University of Vienna, Austria Abstract.