June 99 TAAS Newsletter
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Mathématiques Et Espace
Atelier disciplinaire AD 5 Mathématiques et Espace Anne-Cécile DHERS, Education Nationale (mathématiques) Peggy THILLET, Education Nationale (mathématiques) Yann BARSAMIAN, Education Nationale (mathématiques) Olivier BONNETON, Sciences - U (mathématiques) Cahier d'activités Activité 1 : L'HORIZON TERRESTRE ET SPATIAL Activité 2 : DENOMBREMENT D'ETOILES DANS LE CIEL ET L'UNIVERS Activité 3 : D'HIPPARCOS A BENFORD Activité 4 : OBSERVATION STATISTIQUE DES CRATERES LUNAIRES Activité 5 : DIAMETRE DES CRATERES D'IMPACT Activité 6 : LOI DE TITIUS-BODE Activité 7 : MODELISER UNE CONSTELLATION EN 3D Crédits photo : NASA / CNES L'HORIZON TERRESTRE ET SPATIAL (3 ème / 2 nde ) __________________________________________________ OBJECTIF : Détermination de la ligne d'horizon à une altitude donnée. COMPETENCES : ● Utilisation du théorème de Pythagore ● Utilisation de Google Earth pour évaluer des distances à vol d'oiseau ● Recherche personnelle de données REALISATION : Il s'agit ici de mettre en application le théorème de Pythagore mais avec une vision terrestre dans un premier temps suite à un questionnement de l'élève puis dans un second temps de réutiliser la même démarche dans le cadre spatial de la visibilité d'un satellite. Fiche élève ____________________________________________________________________________ 1. Victor Hugo a écrit dans Les Châtiments : "Les horizons aux horizons succèdent […] : on avance toujours, on n’arrive jamais ". Face à la mer, vous voyez l'horizon à perte de vue. Mais "est-ce loin, l'horizon ?". D'après toi, jusqu'à quelle distance peux-tu voir si le temps est clair ? Réponse 1 : " Sans instrument, je peux voir jusqu'à .................. km " Réponse 2 : " Avec une paire de jumelles, je peux voir jusqu'à ............... km " 2. Nous allons maintenant calculer à l'aide du théorème de Pythagore la ligne d'horizon pour une hauteur H donnée. -
Stellar Pulsation Meeting Program with Timeline
Stellar Pulsation Meeting Program with Timeline Monday, June 1 Schedule 8:00-8:45 Put up posters 8:45-9:00 Welcome Session I. Cepheids and the Distance Scale Chair: W. Gieren 9:00-9:30 Thomas Barnes, Cepheid Distance Scale (Invited) 9:30-9:45 Wolfgang Gieren, A direct distance to the LMC from Cepheid variables 9:45-10:00 Giuseppe Bono, The Cepheid period-luminosity relation and the extragalactic distance scale 10:00-10:15 Lucas Macri, The SH0ES project: HST observations of Cepheids in NGC 4258 and type Ia SN hosts and implications for the Hubble Constant 10:15-10:45 Coffee break and Poster viewing 10:45-11:00 Nicolas Nardetto, From the dynamics of Cepheids to the Milky Way rotation, and the distance scale calibration 11:00-11:15 Shashi Kanbur, Multiphase PC/PL relations: Comparison between theory and observations Session II. Cepheid Theory and Observations Chair: Stephen Becker 11:15-11:45 J. Robert Buchler, Cepheid Pulsation Theory (Invited) 11:45-noon Victoria Scowcroft, The effect of metallicity on Cepheid magnitudes and the distance to M33 Noon-1:15 Lunch 1:15-1:45 David Turner, Polaris and its Kin (Invited) 1:45-2:00 Nancy Evans, Fundamental Parameters of Cepheids: Masses and Multiplicity 2:00-2:15 Radek Smolec, On resonant and non-resonant origin of double-mode Cepheid pulsation 2:15-2:30 Antoine Merand, What we learned from interferometric observations of Cepheids 2:30-2:45 Igor Soszynski, OGLE Data (short invited talk) 2:45-3:00 Edward Schmidt, Mining sky surveys for astrophysically interesting variable stars: The Cepheid period range 3:00-3:30 Coffee Break and Poster Viewing Session III. -
Durham E-Theses
Durham E-Theses First visibility of the lunar crescent and other problems in historical astronomy. Fatoohi, Louay J. How to cite: Fatoohi, Louay J. (1998) First visibility of the lunar crescent and other problems in historical astronomy., Durham theses, Durham University. Available at Durham E-Theses Online: http://etheses.dur.ac.uk/996/ Use policy The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that: • a full bibliographic reference is made to the original source • a link is made to the metadata record in Durham E-Theses • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders. Please consult the full Durham E-Theses policy for further details. Academic Support Oce, Durham University, University Oce, Old Elvet, Durham DH1 3HP e-mail: [email protected] Tel: +44 0191 334 6107 http://etheses.dur.ac.uk me91 In the name of Allah, the Gracious, the Merciful >° 9 43'' 0' eji e' e e> igo4 U61 J CO J: lic 6..ý v Lo ý , ý.,, "ý J ýs ýºý. ur ý,r11 Lýi is' ý9r ZU LZJE rju No disaster can befall on the earth or in your souls but it is in a book before We bring it into being; that is easy for Allah. In order that you may not grieve for what has escaped you, nor be exultant at what He has given you; and Allah does not love any prideful boaster. -
The Low-Mass Content of the Massive Young Star Cluster RCW&Thinsp
MNRAS 471, 3699–3712 (2017) doi:10.1093/mnras/stx1906 Advance Access publication 2017 July 27 The low-mass content of the massive young star cluster RCW 38 Koraljka Muziˇ c,´ 1,2‹ Rainer Schodel,¨ 3 Alexander Scholz,4 Vincent C. Geers,5 Ray Jayawardhana,6 Joana Ascenso7,8 and Lucas A. Cieza1 1Nucleo´ de Astronom´ıa, Facultad de Ingenier´ıa, Universidad Diego Portales, Av. Ejercito 441, Santiago, Chile 2SIM/CENTRA, Faculdade de Ciencias de Universidade de Lisboa, Ed. C8, Campo Grande, P-1749-016 Lisboa, Portugal 3Instituto de Astrof´ısica de Andaluc´ıa (CSIC), Glorieta de la Astronoma´ s/n, E-18008 Granada, Spain 4SUPA, School of Physics & Astronomy, St. Andrews University, North Haugh, St Andrews KY16 9SS, UK 5UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK 6Faculty of Science, York University, 355 Lumbers Building, 4700 Keele Street, Toronto, ON M3J 1P2, Canada 7CENTRA, Instituto Superior Tecnico, Universidade de Lisboa, Av. Rovisco Pais 1, P-1049-001 Lisbon, Portugal 8Departamento de Engenharia F´ısica da Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, s/n, P-4200-465 Porto, Portugal Accepted 2017 July 24. Received 2017 July 24; in original form 2017 February 3 ABSTRACT RCW 38 is a deeply embedded young (∼1 Myr), massive star cluster located at a distance of 1.7 kpc. Twice as dense as the Orion nebula cluster, orders of magnitude denser than other nearby star-forming regions and rich in massive stars, RCW 38 is an ideal place to look for potential differences in brown dwarf formation efficiency as a function of environment. -
A Basic Requirement for Studying the Heavens Is Determining Where In
Abasic requirement for studying the heavens is determining where in the sky things are. To specify sky positions, astronomers have developed several coordinate systems. Each uses a coordinate grid projected on to the celestial sphere, in analogy to the geographic coordinate system used on the surface of the Earth. The coordinate systems differ only in their choice of the fundamental plane, which divides the sky into two equal hemispheres along a great circle (the fundamental plane of the geographic system is the Earth's equator) . Each coordinate system is named for its choice of fundamental plane. The equatorial coordinate system is probably the most widely used celestial coordinate system. It is also the one most closely related to the geographic coordinate system, because they use the same fun damental plane and the same poles. The projection of the Earth's equator onto the celestial sphere is called the celestial equator. Similarly, projecting the geographic poles on to the celest ial sphere defines the north and south celestial poles. However, there is an important difference between the equatorial and geographic coordinate systems: the geographic system is fixed to the Earth; it rotates as the Earth does . The equatorial system is fixed to the stars, so it appears to rotate across the sky with the stars, but of course it's really the Earth rotating under the fixed sky. The latitudinal (latitude-like) angle of the equatorial system is called declination (Dec for short) . It measures the angle of an object above or below the celestial equator. The longitud inal angle is called the right ascension (RA for short). -
Os Aglomerados Globulares NGC 6366 E NGC 6397 *
UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL INSTITUTO DE FÍSICA Os aglomerados globulares NGC 6366 e NGC 6397 * Fabíola Campos Dissertação realizada sobre orientação do Professor Dr. Kepler de Souza Oliveira Filho, co-orientação do Professor Dr. Charles José Bonatto e apresentada no Instituto de Física da UFRGS em preenchimento parcial dos requisitos para obtenção do título de Mestre em Física. Porto Alegre Julho, 2009 * Trabalho financiado pelo Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Para meus pais i Agradecimentos Gostaria de agradecer todas as pessoas que de alguma forma participaram de alguma das etapas para a realização deste trabalho. Ao pessoal do laboratório de Astrofísica, que me recebeu tão bem quando cheguei por lá ainda na iniciação científica, eu agradeço agradável convivência diária, a ajuda e os momentos de confraternização. Ao meu orientador Kepler de Souza Oliveira Filho e meu co-orientador Charles José Bonatto pela paciência e por tudo que fui capaz de aprender pela experiência e exemplo deles. Aos meus colegas da sala M203 pelas discussões filosóficas, por escutarem, perguntarem e discutirem sobre meu trabalho, mesmo sendo de áreas completamente diferentes. Agradeço a minha família pela compreensão, por sempre acreditar em mim e ter me ajudado e incentivado a sempre seguir em frente. Por fim, agradeço a todos os meus amigos que, de uma maneira ou de outra, percorreram esse percurso comigo. Fabíola Campos Universidade Federal do Rio Grande do Sul Julho de 2009 ii Resumo Esse trabalho teve como objetivo o estudo dos aglomerados globulares NGC 6366 e NGC 6397, que estão classificados entre os mais próximos do Sol, através do ajuste de isócronas aos dados fotométricos obtidos em B (4200Å) e V (5500 Å)com o telescópio SOAR e ACS F606W (6060 Å) e F814W (8140 Å) com o Telescópio Espacial Hubble (HST). -
The Brightest Stars Seite 1 Von 9
The Brightest Stars Seite 1 von 9 The Brightest Stars This is a list of the 300 brightest stars made using data from the Hipparcos catalogue. The stellar distances are only fairly accurate for stars well within 1000 light years. 1 2 3 4 5 6 7 8 9 10 11 12 13 No. Star Names Equatorial Galactic Spectral Vis Abs Prllx Err Dist Coordinates Coordinates Type Mag Mag ly RA Dec l° b° 1. Alpha Canis Majoris Sirius 06 45 -16.7 227.2 -8.9 A1V -1.44 1.45 379.21 1.58 9 2. Alpha Carinae Canopus 06 24 -52.7 261.2 -25.3 F0Ib -0.62 -5.53 10.43 0.53 310 3. Alpha Centauri Rigil Kentaurus 14 40 -60.8 315.8 -0.7 G2V+K1V -0.27 4.08 742.12 1.40 4 4. Alpha Boötis Arcturus 14 16 +19.2 15.2 +69.0 K2III -0.05 -0.31 88.85 0.74 37 5. Alpha Lyrae Vega 18 37 +38.8 67.5 +19.2 A0V 0.03 0.58 128.93 0.55 25 6. Alpha Aurigae Capella 05 17 +46.0 162.6 +4.6 G5III+G0III 0.08 -0.48 77.29 0.89 42 7. Beta Orionis Rigel 05 15 -8.2 209.3 -25.1 B8Ia 0.18 -6.69 4.22 0.81 770 8. Alpha Canis Minoris Procyon 07 39 +5.2 213.7 +13.0 F5IV-V 0.40 2.68 285.93 0.88 11 9. Alpha Eridani Achernar 01 38 -57.2 290.7 -58.8 B3V 0.45 -2.77 22.68 0.57 144 10. -
Solar Writer Report for Abraham Lincoln
FIXED STARS A Solar Writer Report for Abraham Lincoln Written by Diana K Rosenberg Compliments of:- Stephanie Johnson Seeing With Stars Astrology PO Box 159 Stepney SA 5069 Australia Tel/Fax: +61 (08) 8331 3057 Email: [email protected] Web: www.esotech.com.au Page 2 Abraham Lincoln Natal Chart 12 Feb 1809 12:40:56 PM UT +0:00 near Hodgenville 37°N35' 085°W45' Tropical Placidus 22' 13° 08°ˆ ‡ 17' ¾ 06' À ¿É ‰ 03° ¼ 09° 00° 06° 09°06° ˆ ˆ ‡ † ‡ 25° 16' 41'08' 40' † 01' 09' Œ 29' ‰ 9 10 23° ¶ 8 27°‰ 11 Ï 27° 01' ‘ ‰02' á 7 12 ‘ áá 23° á 23° ¸ 23°Š27' á Š à „ 28' 28' 6 18' 1 10°‹ º ‹37' 13° 05' ‹ 5 Á 22° ½ 27' 2 4 01' Ü 3 07° Œ ƒ » 09' 23° 09° Ý Ü 06° 16' 06' Ê 00°ƒ 13° 22' Ý 17' 08°‚ Page 23 Astrological Summary Chart Point Positions: Abraham Lincoln Planet Sign Position House Comment The Moon Capricorn 27°Cp01' 12th The Sun Aquarius 23°Aq27' 12th read into 1st House Mercury Pisces 10°Pi18' 1st Venus Aries 7°Ar27' 1st read into 2nd House Mars Libra 25°Li29' 8th Jupiter Pisces 22°Pi05' 1st Saturn Sagittarius 3°Sg08' 9th read into 10th House Uranus Scorpio 9°Sc40' 8th Neptune Sagittarius 6°Sg41' 9th read into 10th House Pluto Pisces 13°Pi37' 1st The North Node Scorpio 6°Sc09' 8th The South Node Taurus 6°Ta09' 2nd The Ascendant Aquarius 23°Aq28' 1st The Midheaven Sagittarius 8°Sg22' 10th The Part of Fortune Capricorn 27°Cp02' 12th Chart Point Aspects Planet Aspect Planet Orb App/Sep The Moon Square Mars 1°32' Separating The Moon Conjunction The Part of Fortune 0°00' Applying The Sun Trine Mars 2°02' Applying The Sun Conjunction The Ascendant -
Mètodes De Detecció I Anàlisi D'exoplanetes
MÈTODES DE DETECCIÓ I ANÀLISI D’EXOPLANETES Rubén Soussé Villa 2n de Batxillerat Tutora: Dolors Romero IES XXV Olimpíada 13/1/2011 Mètodes de detecció i anàlisi d’exoplanetes . Índex - Introducció ............................................................................................. 5 [ Marc Teòric ] 1. L’Univers ............................................................................................... 6 1.1 Les estrelles .................................................................................. 6 1.1.1 Vida de les estrelles .............................................................. 7 1.1.2 Classes espectrals .................................................................9 1.1.3 Magnitud ........................................................................... 9 1.2 Sistemes planetaris: El Sistema Solar .............................................. 10 1.2.1 Formació ......................................................................... 11 1.2.2 Planetes .......................................................................... 13 2. Planetes extrasolars ............................................................................ 19 2.1 Denominació .............................................................................. 19 2.2 Història dels exoplanetes .............................................................. 20 2.3 Mètodes per detectar-los i saber-ne les característiques ..................... 26 2.3.1 Oscil·lació Doppler ........................................................... 27 2.3.2 Trànsits -
GTO Keypad Manual, V5.001
ASTRO-PHYSICS GTO KEYPAD Version v5.xxx Please read the manual even if you are familiar with previous keypad versions Flash RAM Updates Keypad Java updates can be accomplished through the Internet. Check our web site www.astro-physics.com/software-updates/ November 11, 2020 ASTRO-PHYSICS KEYPAD MANUAL FOR MACH2GTO Version 5.xxx November 11, 2020 ABOUT THIS MANUAL 4 REQUIREMENTS 5 What Mount Control Box Do I Need? 5 Can I Upgrade My Present Keypad? 5 GTO KEYPAD 6 Layout and Buttons of the Keypad 6 Vacuum Fluorescent Display 6 N-S-E-W Directional Buttons 6 STOP Button 6 <PREV and NEXT> Buttons 7 Number Buttons 7 GOTO Button 7 ± Button 7 MENU / ESC Button 7 RECAL and NEXT> Buttons Pressed Simultaneously 7 ENT Button 7 Retractable Hanger 7 Keypad Protector 8 Keypad Care and Warranty 8 Warranty 8 Keypad Battery for 512K Memory Boards 8 Cleaning Red Keypad Display 8 Temperature Ratings 8 Environmental Recommendation 8 GETTING STARTED – DO THIS AT HOME, IF POSSIBLE 9 Set Up your Mount and Cable Connections 9 Gather Basic Information 9 Enter Your Location, Time and Date 9 Set Up Your Mount in the Field 10 Polar Alignment 10 Mach2GTO Daytime Alignment Routine 10 KEYPAD START UP SEQUENCE FOR NEW SETUPS OR SETUP IN NEW LOCATION 11 Assemble Your Mount 11 Startup Sequence 11 Location 11 Select Existing Location 11 Set Up New Location 11 Date and Time 12 Additional Information 12 KEYPAD START UP SEQUENCE FOR MOUNTS USED AT THE SAME LOCATION WITHOUT A COMPUTER 13 KEYPAD START UP SEQUENCE FOR COMPUTER CONTROLLED MOUNTS 14 1 OBJECTS MENU – HAVE SOME FUN! -
Aug2006 Astonomy Astrology Talk
Astronomy and Astrology by Roy Swanson 1. INTRODUCTION Over the last several centuries, there has been a lot of confusion about the relation between astronomy and astrology. In this article I will describe some observations concerning this interesting juxtaposition of human knowledge and creativity. Any article that has the temerity to discuss astronomy with astrology is going to encounter a lot of reader preconceptions, so I will go very carefully. These preconceptions arise because most people have strong feelings toward this meeting of worlds. Let me start by affirming that I have positive views for both sides. I might begin with a legal case I ran into when I was a law student some years ago. In the British casebooks there was, some 60 years ago, a case where a young lady was suing a gentleman for seduction using dishonest means. Apparently, in Brighton, a young man was dating a young lady who incautiously mentioned that she firmly believed in astrology. He held back the fact that he wrote the local newspaper's astrology column. As one might expect, he inserted the admonition to "throw caution to the winds" at just the right time, with predictable consequences. My point with this vignette is to underscore the most important aspect of astrology, that it is akin to religion, and one does not pontificate in this area lightly without incurring the wrath of many readers. To balance things, let me mention another vignette. I was walking along an ocean beach one time with a person who was very sceptical of astrology, and he emphasized the impossibility, to his mind, of action at a distance. -
The Low-Mass Population of the Ρ Ophiuchi Molecular Cloud***
A&A 515, A75 (2010) Astronomy DOI: 10.1051/0004-6361/200913900 & c ESO 2010 Astrophysics The low-mass population of the ρ Ophiuchi molecular cloud, C. Alves de Oliveira1,E.Moraux1, J. Bouvier1,H.Bouy2,C.Marmo3, and L. Albert4 1 Laboratoire d’Astrophysique de Grenoble, Observatoire de Grenoble, BP 53, 38041 Grenoble Cedex 9, France e-mail: [email protected] 2 Herschel Science Centre, European Space Agency (ESAC), PO Box 78, 28691 Villanueva de la Cañada, Madrid, Spain 3 Institut d’Astrophysique de Paris, 98bis Bd Arago, 75014 Paris, France 4 Canada-France-Hawaii Telescope Corporation, 65-1238 Mamalahoa Highway, Kamuela, HI 96743, USA Received 18 December 2009 / Accepted 27 February 2010 ABSTRACT Context. Star formation theories are currently divergent regarding the fundamental physical processes that dominate the substellar regime. Observations of nearby young open clusters allow the brown dwarf (BD) population to be characterised down to the planetary mass regime, which ultimately must be accommodated by a successful theory. Aims. We hope to uncover the low-mass population of the ρ Ophiuchi molecular cloud and investigate the properties of the newly found brown dwarfs. Methods. We used near-IR deep images (reaching completeness limits of approximately 20.5 mag in J and 18.9 mag in H and Ks) taken with the Wide Field IR Camera (WIRCam) at the Canada France Hawaii Telescope (CFHT) to identify candidate members of ρ Oph in the substellar regime. A spectroscopic follow-up of a small sample of the candidates allows us to assess their spectral type and subsequently their temperature and membership.