DOCSLIB.ORG

Newsletter for Iya

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

IN THIS ISSUE: H FEATURE ARTICLE IYA CONFERENCE MUSINGS CLAUDINE KAVANAGH . 8 H EYEPIECE VIEWS G . COMELLO: FABRiciUS DUTCH? . 9 M . SIMONSEN: JOHN CHUMack’S ISSUE NO.42 OCTOBER 2009 WWW.AAVSO.ORG ASTROPHOTOGRAPHY . 10 M . TEMPLETON: THE IMPORTANCE OF VISUAL OBSERVATIONS . 11 H ALSO ASTRONOMER INTERRUPTUS . 3 ISTANBUL SYMPOSIUM . 4 DOUBLE DIPPING (AUTUMN) . 12 ciTY MOUSE AND COUNTRY MOUSE . 14 Complete table of contents on page 2 LISTEN UP! AAVSO restless universe THE NEW aaVSO PODcaST Newsletter FOR iya . .7 THE INTERNATIONAL YEAR OF ASTRONOMY... The United Nations officially declared 2009 to be the International Year of Astronomy. The AAVSO is proud to be taking part by leading a capstone project: the monitoring of the rare and mysterious 2009–2010 eclipse of Epsilon Aurigae. In the summer of IYA FROM THE 2009, third-magnitude Eps Aur will experience its next eclipse, which occurs every 27.1 years and lasts 714 days, nearly two years! Projects are being developed to include DIRECTOR’S DESK three audiences: amateurs, the general public, and educators, in this exciting observing ARNE A. HENDEN campaign. For more info on the IYA check out www.astronomy2009.org. hat a busy summer! I’ve been on travel 0.1% results, and is quite inexpensive to produce. Wsince early May, both for AAVSO-related In fact, John is sending an assembled system to functions as well as some personal days. It seems the AAVSO shortly, so it will be available for like life passed me by for a few months. Now that some of my testing. I’ll place the results on our PRESIDENT’S MESSAGE I’m back at HQ, I’m slowly getting caught up web site so that you can see both the process PAULA SZKODY with email and all of the pressing issues that have and how different cameras compare. As part backlogged. of the testing, we’ve also purchased a Canon s my term will end with the upcoming XSi DSLR, and are having a blast running the A.Annual meeting, this will be my seventh It has been a busy summer for the AAVSO as camera under MaximDL. Doug Welch has found and last Newsletter as President. It has been an well. Since my last report, we’ve had the first on-line software to convert almost any recent interesting two years for—me. I’ve learned a lot of the Citizen Sky workshops, held at the Adler Canon point-and-shoot camera into a computer- about the details of operation of the AAVSO, met Planetarium. It is reported elsewhere, but I was controlled system, and I’m looking forward to a variety of observers throughout the U.S. and quite impressed with both the workshop and testing that option as well. John Hoot has sent me Europe, and spent many discussions of where the venue. Larry Ciupik and Lucy Fortson were his software to convert many RAW formats into we should be going and how we can maintain the excellent hosts, and the theater-style classroom FITS images. Perhaps inexpensive entry into the leadership in variable stars in the light of current had excellent speaker visibility and acoustics. digital world is just around the corner! budget constraints and upcoming all-sky surveys. I’d pick them again in a minute! I think the next This discussion will be continuing at the Annual workshop, to be held at the California Academy Hannah diCicco, our summer assistant, finished Council meeting in Newton. If you have any of Sciences, will be even better. The website is up, scanning the Eggen photometric card catalog, thoughts on the Future of the AAVSO, be sure observations are pouring in—everyone should get and is spending a weekend or two finalizing to transmit them to me or any Council member involved in this interesting project and its “star.” the initial web-based access. By the time that before November. We’ve been working hard with a bunch of friendly you read this, we should have placed the card NSF folk to finalize the three-year Informal catalog on-line for you to use. It is going to take The professional community is also attempting Science Education grant that funds Citizen Sky, a lot of volunteer time to get the scanned images to determine its future via the Decadal Survey. and are happy to announce that the award letter into digitized photometry, so we’ll be asking for This will not be easy, since 117 Science white has been released—full speed ahead! your help in the future. Hannah also worked on papers, 69 State of the Profession papers, 62 the IAU unpublished photometry archives, and Technology Development papers, and 8 Theory, I have a huge backlog of CCD systems to test. those should go on-line soon. Again, here is an Computation, and Laboratory Astrophysics papers I’ve been in contact with John Saxton of the BAA, opportunity for volunteers to digitize data for were submitted by the community. While I’m glad who has developed a neat pulsed-LED system for inclusion in the AAVSO International Database. the AAVSO Council does not face this kind of testing detector linearity. It should be capable of CONTINUED ON NEXT PAGE CONTINUED ON NEXT PAGE The AAVSO Newsletter—October 2009 FROM THE DIRECTOR’S DESK CONTINUED... We’ve revamped the Observer Award structure we’re getting more new members and observers everyone, to shake your hand, and to find out to account for the differences in observing than ever before, and they bring fresh ideas into where you are coming from and what you want to techniques among visual, CCD, and PEP, as well the AAVSO. Welcome new faces and names do in the future. If I don’t find you, come looking as to give recognition to beginning observers. Any whenever you see them! for me and introduce yourself. Clear skies and reinforcement we can do at an early stage will good observing! H help keep newcomers interested. We will have a I hope to see you all at the upcoming Annual number of new observers coming from the Citizen meeting. It should be full of interesting papers. Sky direction, as well as from the new Variable I tend to get fixated on a couple of topics and Star Club of the Astronomical League. In fact, people, but realize that I really do want to see PRESIDENT’S MESSAGE It has been a privilege to work with Arne, Mike, CONTINUED... THE AMERICAN ASSOCIATION OF Matt, Elizabeth, Aaron, Rebecca, Doc, Sara, VARIABLE STAR OBSERVERS reading overload, it is an exercise in community Gamze, Michael (AAVSO staff are wonderful!) engagement (or advertisement). If you want to during these last two years. Of course, the DIRECTOR Arne A. Henden delve into what is being proposed for the next organization can’t exist without the active visual, PRESIDENT Paula Szkody ten years, you can read these papers from the PEP, and CCD observers, who continue to impress FIRST VICE PRESIDENT Jaime R. Garcia Community Input link at: me with their quantity and quality of data. The Second VICE PRESIDENT Michael A. Simonsen AAVSO is a unique and fun organization and I http://sites.nationalacademies.org/bpa/BPA_ TREASURER Gary W. Billings 049810 look forward to continued involvement during my last year on the Council and then as a continuing SECRETARY Gary Walker The ranked list of priorities will likely not be member. The emerging access to a growing COUNCILORS available until next summer, so, in the meantime, array of AAVSO robotic telescopes in N and S you can make your own list to compare with constitutes a path to needed data since I’m not one Barry Beaman Katherine Hutton the official committee. Maybe there should be a of the lucky ones that has an observatory that I James Bedient Michael Koppelman contest as to who comes closest? built in my backyard (actually, I don’t even have Pamela Gay Arlo U. Landolt a backyard where I live in Seattle!). Hopefully, Edward F. Guinan Christopher Watson Meanwhile, it’s a good time to start recalling or this will also enable others in my situation (or learning some basic Spanish—the next spring those in bad weather areas—like Seattle) to obtain AAVSO meeting in April will be in Argentina, observations. Of course, mining the data archive Editor Gamze Menali sponsored by the upcoming President (Jaime is always an alternative on those cloudy nights. Assistant editor Elizabeth O. Waagen Garcia). It promises to be a unique experience in a A workshop on data analysis to find periods, etc. Production editor Michael Saladyga dark site and it enables the AAVSO to forge more is being planned for an upcoming meeting. Until DEVELOPMENT Michael A. Simonsen partnerships on an international level. then, happy observing. H The AAVSO Newsletter is published in January, April, July, and October. Items of general interest CONTENTS to be considered for the Newsletter should be sent to [email protected]. Photos and images in From the Director’s Desk 1 this issue courtesy of Sara Beck, John Chumack, President’s Message 1 THE AAVSO Georg Comello, The Digitized Sky Survey, Astronomer Interruptus—Frank Kameny 3 Claudine Kavanagh, Richard Kinne, Gamze Amateur Astronomy Symposium in Istanbul 4 Walter A. FEIBELMAN SUITE Menali, Haldun Menali, and John O’Neill. Report From Stellafane 6 As a reminder, the In Memoriam 6 Feibelman Suite is Membership in the AAVSO is open to anyone who 2009 Annual Meeting 7 available to guests is interested in variable stars and in contributing Distilled Chicago Reflections— who are in the Boston/ to the support of valuable research.
Recommended publications
  • Winter Constellations

    Winter Constellations

    Winter Constellations *Orion *Canis Major *Monoceros *Canis Minor *Gemini *Auriga *Taurus *Eradinus *Lepus *Monoceros *Cancer *Lynx *Ursa Major *Ursa Minor *Draco *Camelopardalis *Cassiopeia *Cepheus *Andromeda *Perseus *Lacerta *Pegasus *Triangulum *Aries *Pisces *Cetus *Leo (rising) *Hydra (rising) *Canes Venatici (rising) Orion--Myth: Orion, the great ​ ​ hunter. In one myth, Orion boasted he would kill all the wild animals on the earth. But, the earth goddess Gaia, who was the protector of all animals, produced a gigantic scorpion, whose body was so heavily encased that Orion was unable to pierce through the armour, and was himself stung to death. His companion Artemis was greatly saddened and arranged for Orion to be immortalised among the stars. Scorpius, the scorpion, was placed on the opposite side of the sky so that Orion would never be hurt by it again. To this day, Orion is never seen in the sky at the same time as Scorpius. DSO’s ● ***M42 “Orion Nebula” (Neb) with Trapezium A stellar ​ ​ ​ nursery where new stars are being born, perhaps a thousand stars. These are immense clouds of interstellar gas and dust collapse inward to form stars, mainly of ionized hydrogen which gives off the red glow so dominant, and also ionized greenish oxygen gas. The youngest stars may be less than 300,000 years old, even as young as 10,000 years old (compared to the Sun, 4.6 billion years old). 1300 ly. ​ ​ 1 ● *M43--(Neb) “De Marin’s Nebula” The star-forming ​ “comma-shaped” region connected to the Orion Nebula. ● *M78--(Neb) Hard to see. A star-forming region connected to the ​ Orion Nebula.
  • Title of the Paper

    Title of the Paper

    Variable Star and Exoplanet Section of Czech Astronomical Society and Planetarium Ostrava Proceedings of the 51st Conference on Variable Stars Research Planetarium Ostrava, Ostrava, Czech Republic 1st November - 3rd November 2019 Editor-in-chief Radek Kocián Participants of the conference OPEN EUROPEAN JOURNAL ON VARIABLE STARS November 2020 http://oejv.physics.muni.cz ISSN 1801-5964 DOI: 10.5817/OEJV2020-0208 TABLE OF CONTENTS Modeling of GX Lacertae ........................................................................................................................................ 5 Cataclysmic variable CzeV404 Her ......................................................................................................................... 8 On the spin period variability in intermediate polars ............................................................................................. 11 Photometric and spectroscopic observation of symbiotic variables at private observatory Liptovská Štiavnica ... 18 Outburst activity of flare stars 2014 – 2019 ........................................................................................................... 29 2 OPEN EUROPEAN JOURNAL ON VARIABLE STARS November 2020 http://oejv.physics.muni.cz ISSN 1801-5964 DOI: 10.5817/OEJV2020-0208 INTRODUCTION The Variable Star and Exoplanet Section of the Czech Astronomical Society organized traditional autumn conference on research and news in the field of variable stars. The conference was held in a comfortable space of Ostrava Planetarium. In addition
  • Správa O Činnosti Organizácie SAV Za Rok 2017

    Správa O Činnosti Organizácie SAV Za Rok 2017

    Astronomický ústav SAV Správa o činnosti organizácie SAV za rok 2017 Tatranská Lomnica január 2018 Obsah osnovy Správy o činnosti organizácie SAV za rok 2017 1. Základné údaje o organizácii 2. Vedecká činnosť 3. Doktorandské štúdium, iná pedagogická činnosť a budovanie ľudských zdrojov pre vedu a techniku 4. Medzinárodná vedecká spolupráca 5. Vedná politika 6. Spolupráca s VŠ a inými subjektmi v oblasti vedy a techniky 7. Spolupráca s aplikačnou a hospodárskou sférou 8. Aktivity pre Národnú radu SR, vládu SR, ústredné orgány štátnej správy SR a iné organizácie 9. Vedecko-organizačné a popularizačné aktivity 10. Činnosť knižnično-informačného pracoviska 11. Aktivity v orgánoch SAV 12. Hospodárenie organizácie 13. Nadácie a fondy pri organizácii SAV 14. Iné významné činnosti organizácie SAV 15. Vyznamenania, ocenenia a ceny udelené organizácii a pracovníkom organizácie SAV 16. Poskytovanie informácií v súlade so zákonom o slobodnom prístupe k informáciám 17. Problémy a podnety pre činnosť SAV PRÍLOHY A Zoznam zamestnancov a doktorandov organizácie k 31.12.2017 B Projekty riešené v organizácii C Publikačná činnosť organizácie D Údaje o pedagogickej činnosti organizácie E Medzinárodná mobilita organizácie F Vedecko-popularizačná činnosť pracovníkov organizácie SAV Správa o činnosti organizácie SAV 1. Základné údaje o organizácii 1.1. Kontaktné údaje Názov: Astronomický ústav SAV Riaditeľ: Mgr. Martin Vaňko, PhD. Zástupca riaditeľa: Mgr. Peter Gömöry, PhD. Vedecký tajomník: Mgr. Marián Jakubík, PhD. Predseda vedeckej rady: RNDr. Luboš Neslušan, CSc. Člen snemu SAV: Mgr. Marián Jakubík, PhD. Adresa: Astronomický ústav SAV, 059 60 Tatranská Lomnica http://www.ta3.sk Tel.: 052/7879111 Fax: 052/4467656 E-mail: [email protected] Názvy a adresy detašovaných pracovísk: Astronomický ústav - Oddelenie medziplanetárnej hmoty Dúbravská cesta 9, 845 04 Bratislava Vedúci detašovaných pracovísk: Astronomický ústav - Oddelenie medziplanetárnej hmoty prof.
  • Contents Sisukord

    Contents Sisukord

    Contents Sisukord Eessõna ................................... 8 Foreword.................................. 9 1 Ülevaade 10 1.1 Uurimisteemad ja grandid ..................... 10 1.1.1 Sihtfinantseeritavad teadusteemad ............ 10 1.1.2 Eesti Teadusagentuuri grandid .............. 10 1.1.3 Euroopa Liidu 7. raamprogrammi projektid ...... 11 1.1.4 Euroopa kosmoseagentuuri Euroopa koostööriikide programmi projektid .................... 11 1.1.5 Euroopa Liidu struktuuritoetused ............ 11 1.1.6 COST projektid ....................... 13 1.1.7 Muud projektid ja lepingud ................ 13 1.2 Töötajad ............................... 14 1.3 Tunnustused ............................. 15 1.4 Eelarve ................................ 17 1.5 Aparatuur ja seadmed ....................... 18 1.6 Teadusnõukogu töö ......................... 19 1.7 Suhted avalikkusega ........................ 20 1.8 Tänuavaldused ........................... 23 2 Summary 24 2.1 Researchprojectsandgrants. 24 2.1.1 Targetfinancedprojects . 24 2.1.2 EstonianResearchCouncilgrants . 24 2.1.3 The European Commission 7th Framework Program- meprojects ......................... 25 2.1.4 European Space Agency Programme for European CooperatingStates . 25 2.1.5 FinancingfromtheEUStructuralFunds. 25 2.1.6 COSTprojects........................ 27 2.1.7 Someotherprojectsandcontracts . 27 2.2 Staff.................................. 28 2.3 Awards................................ 29 2.4 Budget ................................ 31 2.5 Instrumentsandfacilities . 32 3 2.6 ScientificCouncil
  • Seminarvortrag 17.4.2019 Zu Sonnenflecken

    Seminarvortrag 17.4.2019 Zu Sonnenflecken

    Early telescopic observations of sunspots by Simon Marius and other (1610-1620) Ralph Neuhäuser Astrophysikalisches Institut und Universitäts-Sternwarte www.astro.uni-jena.de FSU Jena 400 years telescopic sunspots. Schwabe cycle 10.4 ± 1.2 yr (since 1750) Schwabe cycle and butterfly diagram Sonnenflecken-Relativzahl (Rudolf Wolf 1816-1893): Rz = k x (10 x g + n) Anzahl der Einzelflecken n, Anzahl der Fleckengruppen g, individueller Gütefaktor des jeweiligen Beobachters k Hoyt & Schatten (1998): Sonnenfleckengruppenzahl RG = (12.08 / N) x Si (ki' x Gi) individueller Korrekturfaktor ki' des i-ten Beobachters Gruppenzahl Gi am betreffenden Tag, N ist die Anzahl der Beobachter des entsprechenden Tages. oder Fleckenfläche statt Fleckenanzahl Active day fraction f = (aktive Tage) / (aktive + inaktive Tage) In 17th century, all sources have to be checked ! Clette et al. 2015 - First telescopic observations of sun spots - Observations by Simon Marius 1611 – 1619 - More observations by Saxonius, Tarde, Malapert: Constraining the first telescopic Schwabe cycle (1620) Erste teleskopische Beobachtungen von Flecken (ab 1609): -Vorstufen als Lesestein um 1000 AD (Ibn al-Haytham) - Linsen, Monokel, Brillen im Mittelalter (China, Italien) - Teleskop 1608 (Hans Lipperdey, Holland) - Galileo Galilei: erste Himmelsbeobachtungen (1609) Jupiter-Monde, Sterne in Milchstraße, Venus-Phasen, Sonnenflecken - Kepler Fernrohr (1611) Kopernikanische Wende: Helio-Zentrismus Erste teleskopische Beobachtungen von Flecken (ab 1609): - Galileo Galilei: erste Himmelsbeobachtungen
  • The Maunder Minimum and the Variable Sun-Earth Connection

    The Maunder Minimum and the Variable Sun-Earth Connection

    The Maunder Minimum and the Variable Sun-Earth Connection (Front illustration: the Sun without spots, July 27, 1954) By Willie Wei-Hock Soon and Steven H. Yaskell To Soon Gim-Chuan, Chua Chiew-See, Pham Than (Lien+Van’s mother) and Ulla and Anna In Memory of Miriam Fuchs (baba Gil’s mother)---W.H.S. In Memory of Andrew Hoff---S.H.Y. To interrupt His Yellow Plan The Sun does not allow Caprices of the Atmosphere – And even when the Snow Heaves Balls of Specks, like Vicious Boy Directly in His Eye – Does not so much as turn His Head Busy with Majesty – ‘Tis His to stimulate the Earth And magnetize the Sea - And bind Astronomy, in place, Yet Any passing by Would deem Ourselves – the busier As the Minutest Bee That rides – emits a Thunder – A Bomb – to justify Emily Dickinson (poem 224. c. 1862) Since people are by nature poorly equipped to register any but short-term changes, it is not surprising that we fail to notice slower changes in either climate or the sun. John A. Eddy, The New Solar Physics (1977-78) Foreword By E. N. Parker In this time of global warming we are impelled by both the anticipated dire consequences and by scientific curiosity to investigate the factors that drive the climate. Climate has fluctuated strongly and abruptly in the past, with ice ages and interglacial warming as the long term extremes. Historical research in the last decades has shown short term climatic transients to be a frequent occurrence, often imposing disastrous hardship on the afflicted human populations.
  • Spectral Observations of AG Draconis During Quiescence and Outburst (1993–1995)

    Spectral Observations of AG Draconis During Quiescence and Outburst (1993–1995)

    Astron. Astrophys. 347, 151–163 (1999) ASTRONOMY AND ASTROPHYSICS Spectral observations of AG Draconis during quiescence and outburst (1993–1995) M.T. Tomova and N.A. Tomov National Astronomical Observatory Rozhen, P.O. Box 136, BG-4700 Smolyan, Bulgaria ([email protected]) Received 30 July 1998 / Accepted 1 February 1999 Abstract. High and intermediate resolution observations of the depends on the nebula’s velocity field, which on its side is deter- blue and the Hα spectral regions of the symbiotic star AG Dra mined by the components’ interaction. That is why investigation at quiescence and during an active phase in 1994 and 1995 of the interaction in the symbiotic stars is of prime importance were performed. Variationsof profiles, fluxes and radial velocity for understanding their nature. data of a number of emission lines are investigated. The width The star AG Dra (BD +67◦922) is a known symbiotic (FWHM) of all of these lines was very large at times close to the system with high galactic latitude, large barycentric velocity 1 1994 light maximum. The emission measure of the surrounding γ = 148 km s− and a relatively early spectral type (K). Its nebula was also calculated using Balmer continuum emission photometric− period is about 550d (Meinunger 1979; Skopal on the basis of U photometric observations from the literature. 1994). The consistency of this period with the orbital period It turned out that at the times of the 1994 and 1995 visual light of the binary is confirmed by radial velocity variations of the maxima the emission measure has increased by a factor of 15 cool primary component, measured by Garcia & Kenyon (1988), and 8 respectively, compared with its quiescent maximal value.
  • Stars and Their Spectra: an Introduction to the Spectral Sequence Second Edition James B

    Stars and Their Spectra: an Introduction to the Spectral Sequence Second Edition James B

    Cambridge University Press 978-0-521-89954-3 - Stars and Their Spectra: An Introduction to the Spectral Sequence Second Edition James B. Kaler Index More information Star index Stars are arranged by the Latin genitive of their constellation of residence, with other star names interspersed alphabetically. Within a constellation, Bayer Greek letters are given first, followed by Roman letters, Flamsteed numbers, variable stars arranged in traditional order (see Section 1.11), and then other names that take on genitive form. Stellar spectra are indicated by an asterisk. The best-known proper names have priority over their Greek-letter names. Spectra of the Sun and of nebulae are included as well. Abell 21 nucleus, see a Aurigae, see Capella Abell 78 nucleus, 327* ε Aurigae, 178, 186 Achernar, 9, 243, 264, 274 z Aurigae, 177, 186 Acrux, see Alpha Crucis Z Aurigae, 186, 269* Adhara, see Epsilon Canis Majoris AB Aurigae, 255 Albireo, 26 Alcor, 26, 177, 241, 243, 272* Barnard’s Star, 129–130, 131 Aldebaran, 9, 27, 80*, 163, 165 Betelgeuse, 2, 9, 16, 18, 20, 73, 74*, 79, Algol, 20, 26, 176–177, 271*, 333, 366 80*, 88, 104–105, 106*, 110*, 113, Altair, 9, 236, 241, 250 115, 118, 122, 187, 216, 264 a Andromedae, 273, 273* image of, 114 b Andromedae, 164 BDþ284211, 285* g Andromedae, 26 Bl 253* u Andromedae A, 218* a Boo¨tis, see Arcturus u Andromedae B, 109* g Boo¨tis, 243 Z Andromedae, 337 Z Boo¨tis, 185 Antares, 10, 73, 104–105, 113, 115, 118, l Boo¨tis, 254, 280, 314 122, 174* s Boo¨tis, 218* 53 Aquarii A, 195 53 Aquarii B, 195 T Camelopardalis,
  • Kepler and the Jesuits, Michael Walter Burke-Gaffney, S.J. (1944).Pdf

    Kepler and the Jesuits, Michael Walter Burke-Gaffney, S.J. (1944).Pdf

    ixNM^KrnrFRi^ mji iiiNir*! CO c >KU\ ic»n \f» v Mftimioriiu'.t n ( < nice r O Mai mi v* Nf amtouvs LHrJUULI m nc. xwii § m m > z a H m3C jftaUISp m en C H theJESU CD BY M.W. BURKE - GAFFNEY ST. IGNATIUS LIBRARY »**,.* ^ » 980 T- PARK AVENUE / »naT,„, oh NEW YORK CITY 28 "«w Vowk Date Loaned ©23 IM ^0*0v&*0v&A&*&*&*&H&*&*&*&K&r&*&*.&>»&*'&*&*,O'*'&*-0*&*&* Kepler and the Jesuits ^^<^W^Jl^X^lt^>C^lC^X^X^K^>t^X^5<^X^X^K^X^X^X^X^X^l<^)t^l<^> "My thoughts are with the Dead; with them 1 live in long-past years, Their virtues love, their faults condemn, Partake their hopes and fears, And from their lessons seek and find Instruction with a humble mind." — SOUTHEY. M. W. BURKE-GAFFNEY, S.J. 'I measured the skies." Johann Kepler THE BRUCE PUBLISHING COMPANY MILWAUKEE Imprimi potest: T. J. Mullai-ly, S.J. Nihil obstat: H. B. Rjes, Censor librorum Imprimatur: + Moyses E. Kiley. Archiepiscopus Milwaukiensis Die 11 Aprilis. 1944 CONTENTS Page Chapte f 1 I Introducing Kepler II The Imperial Mathematician 15 III . 26 IV V . 60 VI Sunspots ..... • 71 VII Mercury in the Sun . 8s 9i WAR FORMAT VIII Heliocentric Hypothesis • This book is produced in complete accord with the Governinem regulations for the conservation of paper and other essential materials. IX X Aids to Astronomy . 117 XI The Last Chapter 129 Bibli Copyright. 1944 The Bruce Publishing Company Indej Printed in the United States of America CHAPTER I INTRODUCING KEPLER Johann Kepler was enjoying a studentship at the University of Tubingen when the Parodies, the Lutheran school at Graz, applied for a teacher of astronomy.
  • Download This Article (Pdf)

    Download This Article (Pdf)

    Sigismondi et al., JAAVSO Volume 30, 2001 31 LONG-TERM BEHAVIOR OF MIRA CETI MAXIMA Costantino Sigismondi Department of Astronomy Yale University New Haven, CT 06520-8101 Osservatorio Astronomico di Roma Viale del Parco Mellini 84 00136 Rome, Italy and International Center for Relativistic Astrophysics Physics Department University of Rome “La Sapienza” Piazzale Aldo Moro 5 00185 Rome, Italy Dorrit Hoffleit Department of Astronomy Yale University Riccardo Coccioli Physics Department University of Rome “La Sapienza” Presented at the 90th AAVSO Spring Meeting, May 5, 2001 Abstract We gathered the maxima of Mira Ceti (1596–2000) in order to evaluate the frequency of two consecutive bright apparitions. We did an evaluation of the correlation between two following maxima in order to verify the probability of occurrence of two consecutive bright maxima. Analyzing the maxima of Mira, we found a probability of seeing it brighter than α Ceti once every 21 years. In this case, as in February 1997, Mira can be detected at the first sight as a new component near the most significant asterism in its zone, composed of α, γ, and δ Ceti. We found also a correlation between the magnitude of two consecutive maxima described by the linear fit: 32 Sigismondi et al., JAAVSO Volume 30, 2001 Mi+1 -Mi = - (1.10 ± 0.08) Mi + (3.74 ± 0.26), with R = -0.74. This study was done to test whether Mira could have been the Star of Bethlehem and fulfilled the hypothesis suggested by Kepler of a new star that appeared during the triple conjunction at 1° of Jupiter and Saturn that occurred in 7–6 B.C.E.
  • The Evening Sky Map S JULY 2020

    The Evening Sky Map S JULY 2020

    I N E D R I A C A S T N E O D I T A C L E O R N I G D S T S H A E P H M O O R C I . Z N O a r e o t u a n t o d r O N t o h t e Z r N a I e o C p r t p R h I a R C s O e r C a l H e t L s s t , E E i s a e l H ( d P T F u o t O l i e NORTH D t R a ( l N N M E A n C X r O P e A ) H h . M C T t r . I P o N L S n E E P Z m “ o E r A N F H O NORTHERN HEMISPHERE M T R T Y N H E ” K E CAMELOPARDALIS ) W S . T T PERSEUS D E U W e B R n N e D W 15 b E γ T T W i H A The Evening Sky Map s JULY 2020 E C o O FREE* EACH MONTH FOR YOU TO EXPLORE, LEARN & ENJOY THE NIGHT SKY n S L e K 16 Y E o R f M A t Double Cluster Double A h S SKY MAP SHOWS HOW Get Sky Calendar on Twitter P e T C A m LYNX E E R o J 17 O S http://twitter.com/skymaps s ANDROMEDA Sky Calendar – July 2020 .
  • Paul Scherrer Institut Annual Report 1996. Annex IIIA: Solid State

    Paul Scherrer Institut Annual Report 1996. Annex IIIA: Solid State

    1 tJM- c-H oo 4 CH9700437 PAUL SCHERRER INSTITUT — jmmm PSI • Annual Report 1996 / Annex IMA Solid State Research at Large Facilities j PAUL SCHERRER INSTITUT — J Paul Schemer Institut Wurenlingen and Villigen CH-5232 Villigen PSI Switzerland Telephone +41 56 310 21 11 Telefax +41 56 310 21 99 Internet Address http://www.psi.ch Annual Report 1996 Annex III A Solid State Research at Large Facilities Editors: U. Baltensperger, R. Lorenzen COVER PHOTO: Accelerator SIMS allows very low level trace element detection in ultrapure materials. A view into the sputter­ ing chamber through a vacuum window shows the target holder with a silicon sample and the cesium sputter gun. In order to avoid sample contamination all components are plated with pure gold. TABLE OF CONTENTS Editorial ...................................................................................................................................... 1 Spallation Neutron Source First flux measurement in a SINQ supermirror neutron guide ................................................................................4 Tensile properties in Zircaloy-ll after 590 MeV proton irradiation .......................................................................... 5 Research activities on structure materials of Spallation Neutron Source at SINQ...............................................6 Dynamic response of the target container under pulsed heating .......................................................................... 8 Flow mapping for ESS horizontal target ...............................................................................................................