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Astronomie in Theorie Und Praxis 8. Auflage in Zwei Bänden Erik Wischnewski
Astronomie in Theorie und Praxis 8. Auflage in zwei Bänden Erik Wischnewski Inhaltsverzeichnis 1 Beobachtungen mit bloßem Auge 37 Motivation 37 Hilfsmittel 38 Drehbare Sternkarte Bücher und Atlanten Kataloge Planetariumssoftware Elektronischer Almanach Sternkarten 39 2 Atmosphäre der Erde 49 Aufbau 49 Atmosphärische Fenster 51 Warum der Himmel blau ist? 52 Extinktion 52 Extinktionsgleichung Photometrie Refraktion 55 Szintillationsrauschen 56 Angaben zur Beobachtung 57 Durchsicht Himmelshelligkeit Luftunruhe Beispiel einer Notiz Taupunkt 59 Solar-terrestrische Beziehungen 60 Klassifizierung der Flares Korrelation zur Fleckenrelativzahl Luftleuchten 62 Polarlichter 63 Nachtleuchtende Wolken 64 Haloerscheinungen 67 Formen Häufigkeit Beobachtung Photographie Grüner Strahl 69 Zodiakallicht 71 Dämmerung 72 Definition Purpurlicht Gegendämmerung Venusgürtel Erdschattenbogen 3 Optische Teleskope 75 Fernrohrtypen 76 Refraktoren Reflektoren Fokus Optische Fehler 82 Farbfehler Kugelgestaltsfehler Bildfeldwölbung Koma Astigmatismus Verzeichnung Bildverzerrungen Helligkeitsinhomogenität Objektive 86 Linsenobjektive Spiegelobjektive Vergütung Optische Qualitätsprüfung RC-Wert RGB-Chromasietest Okulare 97 Zusatzoptiken 100 Barlow-Linse Shapley-Linse Flattener Spezialokulare Spektroskopie Herschel-Prisma Fabry-Pérot-Interferometer Vergrößerung 103 Welche Vergrößerung ist die Beste? Blickfeld 105 Lichtstärke 106 Kontrast Dämmerungszahl Auflösungsvermögen 108 Strehl-Zahl Luftunruhe (Seeing) 112 Tubusseeing Kuppelseeing Gebäudeseeing Montierungen 113 Nachführfehler -
The California High Speed Rail Proposal: a Due Diligence Report
September 2008 THE CALIFORNIA HIGH SPEED RAIL PROPO S AL : A DUE DILIGENCE REPOR T By Wendell Cox and Joseph Vranich Project Director: Adrian T. Moore, Ph.D. POLICY STUDY 370 Reason Citizens Against Howard Jarvis Taxpayers Foundation Government Waste Foundation reason.org cagw.org hjta.org/hjtf Reason Foundation’s mission is to advance Citizens Against Government Waste Howard Jarvis Taxpayers Foundation a free society by developing, applying and (CAGW) is a private, nonprofit, nonparti- (HJTF) is devoted to promoting economic promoting libertarian principles, including education, the study of tax policy and san organization dedicated to educating the individual liberty, free markets and the rule defending the interests of taxpayers in the American public about waste, mismanage- of law. We use journalism and public policy courts. research to influence the frameworks and ment, and inefficiency in the federal govern- The Foundation funds and directs stud- actions of policymakers, journalists and ment. ies on tax and economic issues and works opinion leaders. CAGW was founded in 1984 by J. Peter to provide constructive alternatives to the Reason Foundation’s nonpartisan public Grace and nationally-syndicated columnist tax-and-spend proposals from our state policy research promotes choice, competi- Jack Anderson to build support for imple- legislators. tion and a dynamic market economy as the HJTF also advances the interests of mentation of the Grace Commission recom- foundation for human dignity and progress. taxpayers in the courtroom. In appro- mendations and other waste-cutting propos- Reason produces rigorous, peer-reviewed priate cases, HJTF provides legal repre- research and directly engages the policy als. -
100 Closest Stars Designation R.A
100 closest stars Designation R.A. Dec. Mag. Common Name 1 Gliese+Jahreis 551 14h30m –62°40’ 11.09 Proxima Centauri Gliese+Jahreis 559 14h40m –60°50’ 0.01, 1.34 Alpha Centauri A,B 2 Gliese+Jahreis 699 17h58m 4°42’ 9.53 Barnard’s Star 3 Gliese+Jahreis 406 10h56m 7°01’ 13.44 Wolf 359 4 Gliese+Jahreis 411 11h03m 35°58’ 7.47 Lalande 21185 5 Gliese+Jahreis 244 6h45m –16°49’ -1.43, 8.44 Sirius A,B 6 Gliese+Jahreis 65 1h39m –17°57’ 12.54, 12.99 BL Ceti, UV Ceti 7 Gliese+Jahreis 729 18h50m –23°50’ 10.43 Ross 154 8 Gliese+Jahreis 905 23h45m 44°11’ 12.29 Ross 248 9 Gliese+Jahreis 144 3h33m –9°28’ 3.73 Epsilon Eridani 10 Gliese+Jahreis 887 23h06m –35°51’ 7.34 Lacaille 9352 11 Gliese+Jahreis 447 11h48m 0°48’ 11.13 Ross 128 12 Gliese+Jahreis 866 22h39m –15°18’ 13.33, 13.27, 14.03 EZ Aquarii A,B,C 13 Gliese+Jahreis 280 7h39m 5°14’ 10.7 Procyon A,B 14 Gliese+Jahreis 820 21h07m 38°45’ 5.21, 6.03 61 Cygni A,B 15 Gliese+Jahreis 725 18h43m 59°38’ 8.90, 9.69 16 Gliese+Jahreis 15 0h18m 44°01’ 8.08, 11.06 GX Andromedae, GQ Andromedae 17 Gliese+Jahreis 845 22h03m –56°47’ 4.69 Epsilon Indi A,B,C 18 Gliese+Jahreis 1111 8h30m 26°47’ 14.78 DX Cancri 19 Gliese+Jahreis 71 1h44m –15°56’ 3.49 Tau Ceti 20 Gliese+Jahreis 1061 3h36m –44°31’ 13.09 21 Gliese+Jahreis 54.1 1h13m –17°00’ 12.02 YZ Ceti 22 Gliese+Jahreis 273 7h27m 5°14’ 9.86 Luyten’s Star 23 SO 0253+1652 2h53m 16°53’ 15.14 24 SCR 1845-6357 18h45m –63°58’ 17.40J 25 Gliese+Jahreis 191 5h12m –45°01’ 8.84 Kapteyn’s Star 26 Gliese+Jahreis 825 21h17m –38°52’ 6.67 AX Microscopii 27 Gliese+Jahreis 860 22h28m 57°42’ 9.79, -
Tímaákvarðanir Á Myrkvum Valinna Myrkvatvístirna Og Þvergöngum Fjarreikistjarna, Árin 2017-2018, Og Fjarlægðamælingar
Tímaákvarðanir á myrkvum valinna myrkvatvístirna, þvergöngum fjarreikistjarna og fjarlægðamælingar, árin 2017—2018 Snævarr Guðmundsson 2019 Náttúrustofa Suðausturlands Litlubrú 2, 780 Höfn í Hornafirði Nýheimar, Litlubrú 2 780 Höfn Í Hornafirði www.nattsa.is Skýrsla nr. Dagsetning Dreifing NattSA 2019-04 10. apríl 2019 Opin Fjöldi síðna 109 Tímaákvarðanir á myrkvum valinna myrkvatvístirna, Fjöldi mynda 229 þvergöngum fjarreikistjarna og fjarlægðamælingar, árin 2017- 2018. Verknúmer 1280 Höfundur: Snævarr Guðmundsson Verkefnið var styrkt af Prófarkarlestur Þorsteinn Sæmundsson, Kristín Hermannsdóttir og Lilja Jóhannesdóttir Útdráttur Hér er gert grein fyrir stjörnuathugunum á Hornafirði á árabilinu 2017 til loka árs 2018. Í flestum tilfellum voru viðfangsefnin óeiginlegar breytistjörnur, aðallega myrkvatvístirni, en einnig var fylgst með nokkrum fjarreikistjörnum. Í mælingum á myrkvatvístirnum og fjarreikistjörnum er markmiðið að tímasetja myrkva og þvergöngur. Einnig er sagt frá niðurstöðum á nándarstjörnunni Ross 248 og athugunum á lausþyrpingunni NGC 7790 og breytistjörnum í nágrenni hennar. Markmið mælinga á nándarstjörnu og lausþyrpingum er að meta fjarlægðir eða aðra eiginleika fyrirbæranna. Að lokum eru kynntar athuganir á litrófi nokkurra bjartra stjarna. Í samantektinni er sagt frá hverju viðfangsefni í sérköflum. Þessi samantekt er sú þriðja um stjörnuathuganir sem er gefin út af Náttúrustofu Suðausturlands. Niðurstöður hafa verið sendar í alþjóðlegan gagnagrunn þar sem þær, ásamt fjölda sambærilegra mæligagna frá stjörnuáhugamönnum, eru aðgengilegar stjarnvísindasamfélaginu. Hægt er að sækja skýrslur um stjörnuathuganir á vefslóðina: http://nattsa.is/utgefid-efni/. Lykilorð: myrkvatvístirni, fjarreikistjörnur, breytistjörnur, lausþyrpingar, ljósmælingar, fjarlægðir stjarna, litróf stjarna. ii Tímaákvarðanir á myrkvum valinna myrkvatvístirna, þvergöngum fjarreikistjarna og fjarlægðamælingar, árin 2017-2018. — Annáll 2017-2018. Timings of selected eclipsing binaries, exoplanet transits and distance measurements in 2017- 2018. -
Case of High-Speed Ground Transportation Systems
MANAGING PROJECTS WITH STRONG TECHNOLOGICAL RUPTURE Case of High-Speed Ground Transportation Systems THESIS N° 2568 (2002) PRESENTED AT THE CIVIL ENGINEERING DEPARTMENT SWISS FEDERAL INSTITUTE OF TECHNOLOGY - LAUSANNE BY GUILLAUME DE TILIÈRE Civil Engineer, EPFL French nationality Approved by the proposition of the jury: Prof. F.L. Perret, thesis director Prof. M. Hirt, jury director Prof. D. Foray Prof. J.Ph. Deschamps Prof. M. Finger Prof. M. Bassand Lausanne, EPFL 2002 MANAGING PROJECTS WITH STRONG TECHNOLOGICAL RUPTURE Case of High-Speed Ground Transportation Systems THÈSE N° 2568 (2002) PRÉSENTÉE AU DÉPARTEMENT DE GÉNIE CIVIL ÉCOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE PAR GUILLAUME DE TILIÈRE Ingénieur Génie-Civil diplômé EPFL de nationalité française acceptée sur proposition du jury : Prof. F.L. Perret, directeur de thèse Prof. M. Hirt, rapporteur Prof. D. Foray, corapporteur Prof. J.Ph. Deschamps, corapporteur Prof. M. Finger, corapporteur Prof. M. Bassand, corapporteur Document approuvé lors de l’examen oral le 19.04.2002 Abstract 2 ACKNOWLEDGEMENTS I would like to extend my deep gratitude to Prof. Francis-Luc Perret, my Supervisory Committee Chairman, as well as to Prof. Dominique Foray for their enthusiasm, encouragements and guidance. I also express my gratitude to the members of my Committee, Prof. Jean-Philippe Deschamps, Prof. Mathias Finger, Prof. Michel Bassand and Prof. Manfred Hirt for their comments and remarks. They have contributed to making this multidisciplinary approach more pertinent. I would also like to extend my gratitude to our Research Institute, the LEM, the support of which has been very helpful. Concerning the exchange program at ITS -Berkeley (2000-2001), I would like to acknowledge the support of the Swiss National Science Foundation. -
Design Data on Suspension Systems of Selected Rail Passenger Cars RR 5931R 5021
Design Data on Suspension U.S. Department Systems of Selected Rail of Transportation Federal Railroad Passenger Cars Administration Office of Research and Development Washington, DC 20590 ~ail Vehicles & lonents NOTICE This document is disseminated under the sponsorship of the Department of Transportation in the interest of information exchange. The United States Government assumes no liability for its contents or use thereof. NOTICE The United States Government does not endorse products or manufacturers. Trade or manufacturers' names appear herein solely because they are considered essential to the objective of this report. Form Approved REPORT DOCUMENTATION PAGE OMS No. 0704-0188 " Public reporting bulden for this collection of infonnation is estimated to average 1 hourper response. including the time for naviewing instructions. sean:hin9 existing data sources. gathering and maintaining the data needed. and completing and naviewing the collection of information. send comments regarding this bulden estimate or any other aspect of this collection of information. including suggestions for reducing this bulden. to WashingICn Headquarters services Dinactorata for Information Operations and Reports, 1215 Jefferson Davis Highway. SUite 1204, Arlington. VA 22202-4302. and to the Office of Management and Budget, Paperworlc Reduction Project (07~188). Washington. DC 20503. 1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE 3. REPORT TYPE AND OATES COVE~EO July 1996 Final Report ~ober1993-December1994 4. TITLE AND SUBnTLE S. FUNDING NUMBERS Design Data on Suspension Systems of Selected Rail Passenger Cars RR 5931R 5021 6. AUTHORS Alan J. Bing. Shaun R. Berry and Hal B. Henderson 7. PERFORMING ORGANIZAnON NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANlZAnON Arthur D. -
High Speed Passenger Rail Corridor Conference
'I·. > High Speed Passenger Rail Corridor Conference U.S. Departme11t Federal Railroad of Transportation Administration March 26 & 27, 1996 Washington, DC Table: fpf Q Program Agenda List of Attendees FY 1997 Budget Request HSGT Outreach Overview Status Of State Programs 0 HSGT Safety And Research And Development Section 1010/1036 Grade Crossing Program Next Generation High-Speed Rail Technology Development Program High Speed Ground Transportation (HSGT) Planning Funds Notice 0 Railroad Safety Program WGB SPEED PASSENGER RAU, CORRIDOR CONFERENCE March 26 & 27, 1996 , FRA&FHWA Room 2230, NASSIF Building Tuesday. March 26 o Purpose of the Conference o 1997 Budget Request o HSGT Commercial Feasibility Study I HSGT Policy Status o Next Generation Program - Status o Description of Corridor Plan o Status of Improvements o Funding Strategy o Legislative Authority/Needs (DOT/PUC) e.g. Private Grade Crossings o Discussion III. BREAK- 15 minutes IV. STAIE BY STAIE STATUS REPORT (Contd.) 10:30 a.m. to 11: 15 a.m. VII Lunch Break - 12 to 1 p.m. 2 o Passenger Rail Equipment o Other Safety Requirements for HSGT o HSGT Safety R&D - Orth o Questions and Answers IX. BREAK - 15 Minutes o Overview - Smailes o HSGT Grade Crossing Issues o FHWA Program - Louick/Winans XI. BREAK - 15 Minutes o Next Generation Technology Development o Questions and Answers Wednesdqy. March 2 7 o HSGT Commercial Feasibility Study/National Policy - Mongini o State Infrastructure Banks - Program Status/Applications - J. Basso o Innovative Financing Projects - Cooper o IS TEA Reauthorization - Cooper XIV. BREAK 15 Minutes XV. ROUND TABLE· HSGT FUNDING (Contd.) 9:45 a.m. -
Macrocosmo Nº33
HA MAIS DE DOIS ANOS DIFUNDINDO A ASTRONOMIA EM LÍNGUA PORTUGUESA K Y . v HE iniacroCOsmo.com SN 1808-0731 Ano III - Edição n° 33 - Agosto de 2006 * t i •■•'• bSÈlÈWW-'^Sif J fé . ’ ' w s » ws» ■ ' v> í- < • , -N V Í ’\ * ' "fc i 1 7 í l ! - 4 'T\ i V ■ }'- ■t i' ' % r ! ■ 7 ji; ■ 'Í t, ■ ,T $ -f . 3 j i A 'A ! : 1 l 4/ í o dia que o ceu explodiu! t \ Constelação de Andrômeda - Parte II Desnudando a princesa acorrentada £ Dicas Digitais: Softwares e afins, ATM, cursos online e publicações eletrônicas revista macroCOSMO .com Ano III - Edição n° 33 - Agosto de I2006 Editorial Além da órbita de Marte está o cinturão de asteróides, uma região povoada com Redação o material que restou da formação do Sistema Solar. Longe de serem chamados como simples pedras espaciais, os asteróides são objetos rochosos e/ou metálicos, [email protected] sem atmosfera, que estão em órbita do Sol, mas são pequenos demais para serem considerados como planetas. Até agora já foram descobertos mais de 70 Diretor Editor Chefe mil asteróides, a maior parte situados no cinturão de asteróides entre as órbitas Hemerson Brandão de Marte e Júpiter. [email protected] Além desse cinturão podemos encontrar pequenos grupos de asteróides isolados chamados de Troianos que compartilham a mesma órbita de Júpiter. Existem Editora Científica também aqueles que possuem órbitas livres, como é o caso de Hidalgo, Apolo e Walkiria Schulz Ícaro. [email protected] Quando um desses asteróides cruza a nossa órbita temos as crateras de impacto. A maior cratera visível de nosso planeta é a Meteor Crater, com cerca de 1 km de Diagramadores diâmetro e 600 metros de profundidade. -
Index to JRASC Volumes 61-90 (PDF)
THE ROYAL ASTRONOMICAL SOCIETY OF CANADA GENERAL INDEX to the JOURNAL 1967–1996 Volumes 61 to 90 inclusive (including the NATIONAL NEWSLETTER, NATIONAL NEWSLETTER/BULLETIN, and BULLETIN) Compiled by Beverly Miskolczi and David Turner* * Editor of the Journal 1994–2000 Layout and Production by David Lane Published by and Copyright 2002 by The Royal Astronomical Society of Canada 136 Dupont Street Toronto, Ontario, M5R 1V2 Canada www.rasc.ca — [email protected] Table of Contents Preface ....................................................................................2 Volume Number Reference ...................................................3 Subject Index Reference ........................................................4 Subject Index ..........................................................................7 Author Index ..................................................................... 121 Abstracts of Papers Presented at Annual Meetings of the National Committee for Canada of the I.A.U. (1967–1970) and Canadian Astronomical Society (1971–1996) .......................................................................168 Abstracts of Papers Presented at the Annual General Assembly of the Royal Astronomical Society of Canada (1969–1996) ...........................................................207 JRASC Index (1967-1996) Page 1 PREFACE The last cumulative Index to the Journal, published in 1971, was compiled by Ruth J. Northcott and assembled for publication by Helen Sawyer Hogg. It included all articles published in the Journal during the interval 1932–1966, Volumes 26–60. In the intervening years the Journal has undergone a variety of changes. In 1970 the National Newsletter was published along with the Journal, being bound with the regular pages of the Journal. In 1978 the National Newsletter was physically separated but still included with the Journal, and in 1989 it became simply the Newsletter/Bulletin and in 1991 the Bulletin. That continued until the eventual merger of the two publications into the new Journal in 1997. -
Annual Report 2012: A
Research Institute Leiden Observatory (Onderzoekinstituut Sterrewacht Leiden) Annual Report Sterrewacht Leiden Faculty of Mathematics and Natural Sciences Leiden University Niels Bohrweg 2 Postbus 9513 2333 CA Leiden 2300 RA Leiden The Netherlands http://www.strw.leidenuniv.nl Cover: During the past 10 years, characterization of exoplanet atmospheres has been confined to transiting planets. Now, thanks to a particular observational technique and to a novel data analysis designed by astronomers of Leiden Observatory, it is possible to study the atmospheres of planets that do not transit, which represent the majority of known exoplanets. The first of its kind now to be characterized is τ Bo¨otisb (artist impression on the cover). Due to the very high resolution of the CRIRES spectrograph at the VLT, it was possible to detect molecular absorption from CO at 2.3 micron in the dayside spectrum of this planet, and to measure the Doppler shift due to its motion along the orbit. This yielded the planet mass and the orbital inclination, which were unknown before. Recently, using this technique also CO from 51 Pegasi b (the first planet discovered around a main-sequence star), and HD 189733 b were successfully detected. Ultimately, using ground- based high-resolution spectroscopy on the next-generation of telescopes (such as E-ELT) biomarkers may be detected in terrestrial planets orbiting M-dwarfs. An electronic version of this annual report is available on the web at http://www.strw.leidenuniv.nl/research/annualreport.php Production Annual Report 2012: A. van der Tang, E. Gerstel, A.S. Abdullah, K.M. Maaskant, J. -
The Milky Way the Milky Way's Neighbourhood
The Milky Way What Is The Milky Way Galaxy? The.Milky.Way.is.the.galaxy.we.live.in..It.contains.the.Sun.and.at.least.one.hundred.billion.other.stars..Some.modern. measurements.suggest.there.may.be.up.to.500.billion.stars.in.the.galaxy..The.Milky.Way.also.contains.more.than.a.billion. solar.masses’.worth.of.free-floating.clouds.of.interstellar.gas.sprinkled.with.dust,.and.several.hundred.star.clusters.that. contain.anywhere.from.a.few.hundred.to.a.few.million.stars.each. What Kind Of Galaxy Is The Milky Way? Figuring.out.the.shape.of.the.Milky.Way.is,.for.us,.somewhat.like.a.fish.trying.to.figure.out.the.shape.of.the.ocean.. Based.on.careful.observations.and.calculations,.though,.it.appears.that.the.Milky.Way.is.a.barred.spiral.galaxy,.probably. classified.as.a.SBb.or.SBc.on.the.Hubble.tuning.fork.diagram. Where Is The Milky Way In Our Universe’! The.Milky.Way.sits.on.the.outskirts.of.the.Virgo.supercluster..(The.centre.of.the.Virgo.cluster,.the.largest.concentrated. collection.of.matter.in.the.supercluster,.is.about.50.million.light-years.away.).In.a.larger.sense,.the.Milky.Way.is.at.the. centre.of.the.observable.universe..This.is.of.course.nothing.special,.since,.on.the.largest.size.scales,.every.point.in.space. is.expanding.away.from.every.other.point;.every.object.in.the.cosmos.is.at.the.centre.of.its.own.observable.universe.. Within The Milky Way Galaxy, Where Is Earth Located’? Earth.orbits.the.Sun,.which.is.situated.in.the.Orion.Arm,.one.of.the.Milky.Way’s.66.spiral.arms..(Even.though.the.spiral. -
Aerodynamic Phenomena in Stellar Atmospheres, a Bibliography
- PB 151389 knical rlote 91c. 30 Moulder laboratories AERODYNAMIC PHENOMENA STELLAR ATMOSPHERES -A BIBLIOGRAPHY U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS ^M THE NATIONAL BUREAU OF STANDARDS Functions and Activities The functions of the National Bureau of Standards are set forth in the Act of Congress, March 3, 1901, as amended by Congress in Public Law 619, 1950. These include the development and maintenance of the national standards of measurement and the provision of means and methods for making measurements consistent with these standards; the determination of physical constants and properties of materials; the development of methods and instruments for testing materials, devices, and structures; advisory services to government agencies on scientific and technical problems; in- vention and development of devices to serve special needs of the Government; and the development of standard practices, codes, and specifications. The work includes basic and applied research, development, engineering, instrumentation, testing, evaluation, calibration services, and various consultation and information services. Research projects are also performed for other government agencies when the work relates to and supplements the basic program of the Bureau or when the Bureau's unique competence is required. The scope of activities is suggested by the listing of divisions and sections on the inside of the back cover. Publications The results of the Bureau's work take the form of either actual equipment and devices or pub- lished papers.