SOLAR ECLIPSE Viewing Guide + Much More Muse¨ JULY/AUGUST 2017 Volumevolume 221, Issue 06
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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. -
Illuminating Eclipses: Astronomy and Chronology in King Lear
Brief Chronicles Vol. II (2010) 32 Illuminating Eclipses: Astronomy and Chronology in King Lear Hanno Wember ohann Gottfried Herder wrote his famous essay Shakespeare in 1772. He was (as Wieland, Lessing and, of course, Goethe and Schiller) one of the 18th century German writers “who first embraced Shakespeare and welcomed his Jgenius as a dramatist.”1 In his 1980 introduction to Herder’s essay, Konrad Nussbächer wrote: “Shakespeare is not, as it appeared in the 18th century, a natural genius growing up in the wild, but a highly cultured, artful Renaissance poet and practitioner of the stage.” Astronomy was one of the liberal arts and sciences a “highly cultured” man of Renaissance England was expected to know. This essay will review a few illuminating examples of Shakespeare’s profound knowledge of astronomy, and will examine a new astronomical reference that could shed significant new light on Shakespearean chronology. Shakespeare’s Astronomy In many regards Shakespeare had a better knowledge of the relationship between the moon and the tides2 than his distinguished contemporary Galileo (1564 - 1642), who tried to explain the tides by the two motions of the earth, correlating to the day and the year.3 This was an erroneous explanation for ebb and flow. But while Galileo refused to acknowledge any tidal influence of the moon, Bernardo knew better, referring to the moon as the Brief Chronicles Vol. II (2010) 33 moist star Upon whose influence Neptune’s empire stands (Hamlet, I.1.135)4 To Prince Henry, likewise, the moon commands the tides: The fortune of us that are moon’s men doth ebb and flow like the sea, being governed as the sea is by the moon…..Now in as low an ebb as the foot of the ladder, and by and by in as high a flow as the ridge of the gallows. -
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. -
Course Descriptions
COURSE DESCRIPTIONS Architectural Design Technology COURSE DESCRIPTIONS The following course descriptions are intended to briefly describe the nature of each of the courses. For more complete information, AAD 180 Fundamentals of Design I 3 (2,2,0,0) departments or faculty can provide specific course syllabuses. Introduction to the principles and theories of design and design methodology in the “making” of representations of form and space. The numbers in the right side of each description define the credits and average weekly contact hours the student will spend AAD 182 Fundamentals of Design II 3 (2,2,0,0) in formal classes during a 16 week semester. Classes scheduled Continuation of AAD 180, with emphasis on spatial sequence, for other than a 16 week semester will have the contact hours tectonics, and design precedents. adjusted accordingly. Prerequisite: AAD 180. A – defines the number of semester credits B Architecture – average number of lecture hours per week C – average number of laboratory hours per week AAE 100 Introduction to Architecture 3 (3,0,0,0) D – average number of clinical hours per week Survey of architecture. Includes historical examples and the E – average number of other formal instructional hours per week theoretical, social, technical, and environmental forces that shape this profession. Especially for majors and non-majors who wish to explore this field as a career choice. Automotive Technology, Collision and Repair ABDY 101B Collision Repair Fundamentals and Estimating 4 (1,6,0,0) This lecture/lab course includes an overview of the collision industry, instruction in safe shop procedures, measurement, vehicle disassembly, and estimating software and techniques. -
Variation of Secondary Cosmic Gamma Ray Flux During Lunar Eclipse
Variation of secondary cosmic gamma ray flux during lunar eclipse S. Roy* , S. Chatterjee , S. Chakraborty** , S. Biswas , S. Das , S. K. Ghosh , S. Raha Department of Physics (CAPSS), Bose Institute, Kolkata, India. E-mail: [email protected] Introduction Astronomical events such as Solar eclipses and Lunar eclipses provide the opportunity for studying the disturbance produced in the atmosphere and its effect on cosmic ray intensity. There are earlier reports on decrease in secondary cosmic gamma ray (SCGR) flux during solar eclipse and enhancement of the same during lunar eclipse [1-4]. We have measured the variation of SCGR flux during two lunar eclipses that took place in India in the year 2018, one on 31st of January and the other on 27th of July. Both the measurements have been carried out in the Detector laboratory of Bose Institute, Kolkata, India, using NaI (Tl) scintillator detector. We observed slight increment of SCGR during the lunar eclipse of January. We did not observe any significant changes in SCGR during lunar eclipse of July. Experimental Setup ❖ NaI(Tl) scintillator detector is used. Size of the crystal: 5.1cm × 5.1cm ❖ Gamma ray sources used for detector calibration: 137Cs (662 keV), ❖ PMT bias: +600V. Signals are amplified and shaped before sending 60Co (1173 keV and 1332 keV) and 22Na (551 keV) them to MCA for energy spectrum accumulation ORTEC-556 ORTEC-671 Schematic of the signal processing electronics Picture of the experimental setup Gamma ray spectra with different configurations of lead shielding ADC -
The Space-Based Global Observing System in 2010 (GOS-2010)
WMO Space Programme SP-7 The Space-based Global Observing For more information, please contact: System in 2010 (GOS-2010) World Meteorological Organization 7 bis, avenue de la Paix – P.O. Box 2300 – CH 1211 Geneva 2 – Switzerland www.wmo.int WMO Space Programme Office Tel.: +41 (0) 22 730 85 19 – Fax: +41 (0) 22 730 84 74 E-mail: [email protected] Website: www.wmo.int/pages/prog/sat/ WMO-TD No. 1513 WMO Space Programme SP-7 The Space-based Global Observing System in 2010 (GOS-2010) WMO/TD-No. 1513 2010 © World Meteorological Organization, 2010 The right of publication in print, electronic and any other form and in any language is reserved by WMO. Short extracts from WMO publications may be reproduced without authorization, provided that the complete source is clearly indicated. Editorial correspondence and requests to publish, reproduce or translate these publication in part or in whole should be addressed to: Chairperson, Publications Board World Meteorological Organization (WMO) 7 bis, avenue de la Paix Tel.: +41 (0)22 730 84 03 P.O. Box No. 2300 Fax: +41 (0)22 730 80 40 CH-1211 Geneva 2, Switzerland E-mail: [email protected] FOREWORD The launching of the world's first artificial satellite on 4 October 1957 ushered a new era of unprecedented scientific and technological achievements. And it was indeed a fortunate coincidence that the ninth session of the WMO Executive Committee – known today as the WMO Executive Council (EC) – was in progress precisely at this moment, for the EC members were very quick to realize that satellite technology held the promise to expand the volume of meteorological data and to fill the notable gaps where land-based observations were not readily available. -
Annual Veterinary Kennel Inspections Re-Homing Retired Greyhounds Independently
Vol 11 / No 17 23 August 2019 Fortnightly by Subscription calendar Annual Veterinary Kennel Inspections Re-homing Retired Greyhounds Independently SEAGLASS TIGER wins the Ladbrokes Gold Cup 2019 at Monmore for owner Evan Herbert and trainer Patrick Janssens (pictured with wife Cheryl (far left) and Photo: Joanne Till kennelhand Kelly Bakewell holding the winner). FOR ALL THE LATEST NEWS - WWW.GBGB.ORG.UK -VSSV^.).)VU;^P[[LY'NYL`OV\UKIVHYK'NINIZ[HɈHUK0UZ[HNYHTHUK-HJLIVVR CATEGORY ONE FINALS Date Distance Track Event Mon 26 Aug 500m Puppies Nottingham Puppy Classic Fri 06 Sep 575m Romford Coral Champion Stakes Fri 13 Sep 925m Romford Coral TV Trophy Thu 19 Sep 462m Yarmouth RPGTV East Anglian Derby Thu 26 Sep 480m British Bred Newcastle BGBF Northern Plate Fri 27 Sep 400m Puppies Romford Romford Puppy Cup Sat 05 Oct 714m Crayford Jay and Kay Coach Tours Kent St Leger Sun 06 Oct 480m Central Park Ladbrokes Kent Derby Mon 21 Oct 500m British Bred Nottingham BGBF/Nottingham British Breeders Stakes Weds 23 Oct 661m Doncaster SIS Yorkshire St Leger Sun 27 Oct 460m Henlow Henlow Derby Sat 02 Nov 540m Crayford Ladbrokes Gold Collar Sat 16 Nov 710m Perry Barr RPGTV St Leger Mon 18 Nov 500m Nottingham Eclipse Stakes Fri 06 Dec 575m Romford Coral Essex Vase 7XH'HF P%ULWLVK%UHG 6KHIÀHOG %*%)%ULWLVK%UHG'HUE\ Thu 19 Dec 515m Brighton & Hove Coral Olympic )XUWKHUFRPSHWLWLRQVWREHFRQÀUPHG$ERYHGDWHVPD\EHVXEMHFWWRFKDQJH ANNUAL VETERINARY KENNEL INSPECTIONS All Professional and Greyhound trainers are reminded to arrange for their Annual Veterinary Kennel Inspection to take place using the form that was enclosed with their 2019 licence cards, additional forms can be obtained from any Racing Office, from the GBGB office (0207 822 0927), or from the GBGB website. -
American Mathematical Association of Two-Year Colleges
American Mathematical Association of Two-Year Colleges Photo courtesy of Visit Phoenix/dspaz.com 47th AMATYC Annual Conference Keynote Speakers October 28 – 31, 2021 Lindy Elkins-Tanton Arizona State University The NASA Psyche Mission: Journey to a Metallic World Sheraton Phoenix Downtown 340 North 3rd Street Talithia Williams Harvey Mudd College Phoenix, AZ 85004 Power in Numbers: Reservations (online): Unveiling Hidden Figures https://tinyurl.com/AMATYC2021Sheraton Reservations (phone): 1.866.837.4213 ext. 4 (mention AMATYC Conference) Featured Speakers James Tanton Mathematical Association of America Opening Doors The Astounding Mathematics Through Mathematics of Bicycle Tracks Scott Adamson Chandler-Gilbert CC Fired Up to Take Online Teaching Innovations Back to the Classroom! Hosted by ArizMATYC and the Southwest Region www.amatyc.org Vision Statement To be the leading voice and resource for excellence in mathematics education in the first two years of college Mission Statement To provide high quality professional development, to advocate and collaborate at all levels, and to build communities of learners for all involved in mathematics education in the first two years of college. Adopted by the Board on April 1, 2016 Core Values These are the Core Values that guide AMATYC’s internal and external interactions with each other and our community: Academic Excellence Access Collegiality Innovation Integrity Professional Development Teaching Excellence KEYNOTE SPEAKERS Thursday Keynote Session Lindy Elkins-Tanton The NASA Psyche Mission: Journey to a Metallic World Thursday, October 28 3:00 pm – 4:30 pm “Psyche” is both the name of a metallic asteroid, and the name of the NASA mission to visit that asteroid. -
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. -
Viewing an Eclipse Safely
ECLIPSES SOLAR an eclipse safely How to observe SOLAR ECLIPSE, OCTOBER 2014, BY LEMAN NORTHWAY Solar eclipses are quite rare and are often a major event. The SOLAR ECLIPSES Moon passes right in front of the Sun, blotting out its disc. Every time a solar eclipse occurs there are various things to look for. However, it is extremely dangerous to just go out and look up. The Sun is so bright that just looking at it can blind you, so you’ll need to prepare beforehand. There are various ways to observe eclipses safely, using both everyday materials and telescopes or binoculars. So read this leaflet Introduction to find out what happens during an eclipse and how you can see all the stages of the event safely. This booklet was written by the Royal Astronomical Society with The Society for Popular Astronomy and is endorsed by the British Astronomical Association The Royal Astronomical The Society for Popular Formed in 1890, the Society, founded in Astronomy is for British Astronomical 1820, encourages and beginners of all ages. Our Association has an promotes the study of aim is to make astronomy international reputation astronomy, solar-system fun, and our magazine, for the quality of science, geophysics and Popular Astronomy, is full its observational closely related branches of information to help and scientific work. of science. you get to know the Membership is open to www.ras.org.uk sky and get involved. We even have a special Young all persons interested in HIGGS-BOSON.COM JOHNSON: PAUL BY D Stargazers section, run by TV’s Lucie Green. -
1986Aj 92.120Id the Astronomical Journal Volume 92, Number 5 November 1986 Modeling Pluto-Charon Mutual Eclipse Events. I. First
THE ASTRONOMICAL JOURNAL VOLUME 92, NUMBER 5 NOVEMBER 1986 92.120ID MODELING PLUTO-CHARON MUTUAL ECLIPSE EVENTS. I. FIRST-ORDER MODELS R. Scott Dunbar and Edward F. Tedesco Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 1986AJ Received 29 May 1986; revised 7August 1986 ABSTRACT We present numerical and analytical models describing the light curves resulting from mutual events between close planetary binaries, with particular application to the Pluto-Charon system. These models are referred to as “first-order” models because they incorporate the effects of shadowing in such sys- tems, in contrast to “zeroth-order” models, which do not include shadowing. The shadows cast between close binaries of similar size (as in the case of Pluto and Charon) can be treated as extensions of the eclipsing bodies themselves at small solar phase angles. Shadowing plays a major role in the morphology of mutual event light curves. The numerical approach is a straightforward, but computationally inten- sive, discrete-element integration. The analytical approach uses a conceptually simple model of three circular disks, representing the planet, satellite, and shadow, and computes the complex geometric relationship among these three disks to obtain the eclipse magnitude at each time step. The results of the two models agree to well within the expected light-curve measurement error. A preliminary model fit to the depths of five mutual eclipse events observed in 1985 and 1986 gives eclipse light-curve-derived estimates of the orbit radius C = 16.5 + 0.5 Pluto radii, the radius ratio B0 = 0.65 + 0.03, and the Charon:Pluto albedo ratio K — 0.55 + 0.15.