FIXED STARS a SOLAR WRITER REPORT for Churchill Winston WRITTEN by DIANA K ROSENBERG Page 2
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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. -
Lurking in the Shadows: Wide-Separation Gas Giants As Tracers of Planet Formation
Lurking in the Shadows: Wide-Separation Gas Giants as Tracers of Planet Formation Thesis by Marta Levesque Bryan In Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, California 2018 Defended May 1, 2018 ii © 2018 Marta Levesque Bryan ORCID: [0000-0002-6076-5967] All rights reserved iii ACKNOWLEDGEMENTS First and foremost I would like to thank Heather Knutson, who I had the great privilege of working with as my thesis advisor. Her encouragement, guidance, and perspective helped me navigate many a challenging problem, and my conversations with her were a consistent source of positivity and learning throughout my time at Caltech. I leave graduate school a better scientist and person for having her as a role model. Heather fostered a wonderfully positive and supportive environment for her students, giving us the space to explore and grow - I could not have asked for a better advisor or research experience. I would also like to thank Konstantin Batygin for enthusiastic and illuminating discussions that always left me more excited to explore the result at hand. Thank you as well to Dimitri Mawet for providing both expertise and contagious optimism for some of my latest direct imaging endeavors. Thank you to the rest of my thesis committee, namely Geoff Blake, Evan Kirby, and Chuck Steidel for their support, helpful conversations, and insightful questions. I am grateful to have had the opportunity to collaborate with Brendan Bowler. His talk at Caltech my second year of graduate school introduced me to an unexpected population of massive wide-separation planetary-mass companions, and lead to a long-running collaboration from which several of my thesis projects were born. -
Program and Abstract Book
Program and Abstract Book Precision Asteroseismology: Celebration of the Scientific Opus of Wojtek Dziembowski Date: 19 – 23 August 2013, Location: WrocÃlaw (Poland) Scientific Organizing Committee: Annie Baglin (France) Bill Chaplin (UK) Jørgen Christensen-Dalsgaard (Denmark) Margarida Cunha (Portugal) Jadwiga Daszy´nska-Daszkiewicz (Chair, Poland) Gilles Fontaine (Canada) Joyce Guzik (USA) Marcella Marconi (Italy) Karen Pollard (New Zealand) Hiromoto Shibahashi (Chair, Japan) Juan Carlos Su´arez(Spain) Werner Weiss (Austria) Local Organizing Committee: Urszula Bąk-Stęślicka Barbara Cader-Sroka Jadwiga Daszyńska-Daszkiewicz (Chair) Zbigniew Kołaczkowski Grzegorz Kopacki Andrzej Pigulski (Chair) Marek Stęślicki Przemysław Walczak 1 2 PROGRAM OF THE SYMPOSIUM DAY 1. August 19, Monday Session 1. Introduction Chair: Jadwiga Daszy´nska-Daszkiewicz 8:00 – 9:00 Registration and setting up posters 9:00 – 9:20 Welcome and opening 9:20 – 10:20 An overview of the scientific career of Wojtek Dziem- bowski by Douglas Gough (30 min) & Alexey Pamyatnykh (30 min) 10:20 – 10:50 Coffee break Chair: Jørgen Christensen-Dalsgaard 10:50 – 11:30 Introductory talk: What can we expect from precision asteroseismology (Gerald Handler) Session 2. Observations: from ground to space 11:30 – 12:00 Pulsating variables from the OGLE and Araucaria pro- jects (Grzegorz Pietrzy´nski,invited) 12:00 – 12:30 A review of pulsating stars from the ASAS data (Andrzej Pigulski, invited) 12:30 – 12:45 Asteroseismology with SuperWASP (Barry Smalley) 12:45 – 13:00 A new class of low amplitude -
Naming the Extrasolar Planets
Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named. -
Charles Augustus Young
NATIONAL ACADEMY OF SCIENCES BIOGRAPHICAL MEMOIRS PART OF VOLUME VII BIOGRAPHICAL MEMOIR CHARLES AUGUSTUS YOUNG 1834-1908 EDWIN B. FROST PRESENTED BEFORE THE ACADEMY AT THE AUTUMN MEETING, I9O9 CITY OF WASHINGTON PUBLISHED BY THE NATIONAL ACADEMY OF SCIENCES April, 1910 CHARLES AUGUSTUS YOUNG. Charles Augustus Young was born in Hanover, New Hamp- shire, the seat of Dartmouth College, on December 15, 1834, and he died seventy-three years later, on January 3, 1908, in the same village, which had thrice been his home—in youth, in early manhood, and after his retirement from active work. An academic career was his by inheritance, for his maternal grandfather, Ebenezer Adams, of New Hampshire origin, was professor of mathematics and natural philosophy at Dartmouth from 1810 to 1833, and was succeeded in that chair by his son-in-law, Ira Young, father of Charles Augustus. Ira Young was also from New Hampshire, having been born at Lebanon, five miles from the college, in 1801. He was prevented by circumstances from entering college until after he was of age. but he took high rank and graduated in 1828, returning to the college two years later as tutor, and then assuming the duties of professor in 1833. Five years later his chair was changed to that of natural philosophy and astronomy, and it was filled by him with distinguished success until he died, in 1858. He was survived for thirty years by his widow, Eliza Adams, a woman of strong character and intellect. Charles Augustus thus grew up in the atmosphere of natural philosophy, and, gifted with an active mind, he was ready for college before he had reached his fourteenth birthday; but it was thought best by his father that he should delay his entrance for a year. -
Your Horoscope Chart Report
Your Horoscope Chart Report Report Prepared By ; Team Cyber Astro 1 Dear XYZ Please find our analysis for your Complete Horoscope Chart Report . We thank you for giving us this opportunity to analyse your birth chart. The accuracy of the predictions depends on the accuracy of the time of birth given to us by you. Kindly note that as per Vedic Astrology the stars will control only 75% of your life and the critical 25% will be your own efforts. We wish you luck and pray to God that you overcome all obstacles in your life . With Warm Regards Mr. D. P. Sarkar Team Cyber Astro 2 Table of Content Sr. No. Content Details. Page Nos . 1. Your Personal Birth Details. 5 2. Explanation of your Horoscope Chart; 6 to 8 Your horoscope chart. 6 Primary details of your horoscope chart. 7 Introduction of your horoscope chart. 8 3. Relationship between planets and signs in your horoscope chart; 9 to 15 Sign type & element table. 10 Sign type explanation. 11 to 12 Sign element explanation. 13 Planet type and element table. 13 Strength & Functionalities of planets. 14 Explanation of special status of planets. 15 4. Interpretation of three pillars of your horoscope chart. 16 to 22 Your ascendant interpretation. 16 Your Sun sign interpretation. 17 to 19 Your Moon sign interpretation. 20 Other planets interpretation. 21 to 22 5. Houses in your horoscope chart. 23 to 27 House table of your horoscope chart. 23 to 24 Explanation of each house of horoscope chart. 25 to 28 6. Analysis of Vimsottari Dasha periods: 29 to 35 Dasha table. -
Claudius Ptolemy: Tetrabiblos
CLAUDIUS PTOLEMY: TETRABIBLOS OR THE QUADRIPARTITE MATHEMATICAL TREATISE FOUR BOOKS OF THE INFLUENCE OF THE STARS TRANSLATED FROM THE GREEK PARAPHRASE OF PROCLUS BY J. M. ASHMAND London, Davis and Dickson [1822] This version courtesy of http://www.classicalastrologer.com/ Revised 04-09-2008 Foreword It is fair to say that Claudius Ptolemy made the greatest single contribution to the preservation and transmission of astrological and astronomical knowledge of the Classical and Ancient world. No study of Traditional Astrology can ignore the importance and influence of this encyclopaedic work. It speaks not only of the stars, but of a distinct cosmology that prevailed until the 18th century. It is easy to jeer at someone who thinks the earth is the cosmic centre and refers to it as existing in a sublunary sphere. However, our current knowledge tells us that the universe is infinite. It seems to me that in an infinite universe, any given point must be the centre. Sometimes scientists are not so scientific. The fact is, it still applies to us for our purposes and even the most rational among us do not refer to sunrise as earth set. It practical terms, the Moon does have the most immediate effect on the Earth which is, after all, our point of reference. She turns the tides, influences vegetative growth and the menstrual cycle. What has become known as the Ptolemaic Universe, consisted of concentric circles emanating from Earth to the eighth sphere of the Fixed Stars, also known as the Empyrean. This cosmology is as spiritual as it is physical. -
Dynamical Evolution and Stability Maps of the Proxima Centauri System 3
A MNRAS 000, 1–11 (2012) Preprint 24 September 2018 Compiled using MNRAS L TEX style file v3.0 Dynamical evolution and stability maps of the Proxima Centauri system Tong Meng1,2, Jianghui Ji1⋆, Yao Dong1 1CAS Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China 2University of Chinese Academy of Sciences, Beijing 100049, China Received 2012 July 26; in original form 2011 October 30 ABSTRACT Proxima Centauri was recently discovered to host an Earth-mass planet of Proxima b, and a 215-day signal which is probably a potential planet c. In this work, we investigate the dynamical evolution of the Proxima Centauri system with the full equations of motion and semi-analytical models including relativistic and tidal effects. We adopt the modified Lagrange-Laplace secular equations to study the evolution of eccentricity of Proxima b, and find that the outcomes are consistent with those from the numerical simulations. The simulations show that relativistic effects have an influence on the evolution of eccentricities of planetary orbits, whereas tidal effects primarily affects the eccentricity of Proxima b over long timescale. Moreover, using the MEGNO (the Mean Exponential Growth factor of Nearby Orbits) technique, we place dynamical constraints on orbital parameters that result in stable or quasi-periodic motions for coplanar and non-coplanar configurations. In the coplanar case, we find that the orbit of Proxima b is stable for the semi-major axis ranging from 0.02 au to 0.1 au and the eccentricity being less than 0.4. This is where the best-fitting parameters for Proxima b exactly fall. -
September 2020 BRAS Newsletter
A Neowise Comet 2020, photo by Ralf Rohner of Skypointer Photography Monthly Meeting September 14th at 7:00 PM, via Jitsi (Monthly meetings are on 2nd Mondays at Highland Road Park Observatory, temporarily during quarantine at meet.jit.si/BRASMeets). GUEST SPEAKER: NASA Michoud Assembly Facility Director, Robert Champion What's In This Issue? President’s Message Secretary's Summary Business Meeting Minutes Outreach Report Asteroid and Comet News Light Pollution Committee Report Globe at Night Member’s Corner –My Quest For A Dark Place, by Chris Carlton Astro-Photos by BRAS Members Messages from the HRPO REMOTE DISCUSSION Solar Viewing Plus Night Mercurian Elongation Spooky Sensation Great Martian Opposition Observing Notes: Aquila – The Eagle Like this newsletter? See PAST ISSUES online back to 2009 Visit us on Facebook – Baton Rouge Astronomical Society Baton Rouge Astronomical Society Newsletter, Night Visions Page 2 of 27 September 2020 President’s Message Welcome to September. You may have noticed that this newsletter is showing up a little bit later than usual, and it’s for good reason: release of the newsletter will now happen after the monthly business meeting so that we can have a chance to keep everybody up to date on the latest information. Sometimes, this will mean the newsletter shows up a couple of days late. But, the upshot is that you’ll now be able to see what we discussed at the recent business meeting and have time to digest it before our general meeting in case you want to give some feedback. Now that we’re on the new format, business meetings (and the oft neglected Light Pollution Committee Meeting), are going to start being open to all members of the club again by simply joining up in the respective chat rooms the Wednesday before the first Monday of the month—which I encourage people to do, especially if you have some ideas you want to see the club put into action. -
The Age of Aquarius by Don Cerow, NCGR IV
The Age of Aquarius by Don Cerow, NCGR IV Welcome to the Age of Aquarius.* We are a generation that is perched on the dawn of a new epoch, a new vibration. The world is changing. Everything from politics to industry to our mortgages turns on a new pivot, and we are lucky enough to be able to witness the unfolding. There are those who feel as though the Age has already begun. Others believe that the Age is not yet here, and the called for changes have not yet fully unfolded. Both are correct. As we look around us, electricity fills the air. Lights, power, technology, refrigeration, computers, smart phones, microchips, and science are all manifestations of the New Age at work, of a brave new world already (up and running). But the use of fossil fuels, oil, coal, and natural gas, the inability of Congress to get things done due to party allegiances, the growing intensity of storms and the general weather patterns, are all indications Alpha Piscium and Omega Piscium are the stars thought by Don Cerow that the Age of Pisces is not yet over. to observationally “benchmark” the Age of Pisces. We are building to a crescendo with the warming of the planet being the Revelation 22:13 says, “I am the Alpha and the Omega, the First and the Last, the Beginning and the End.” When Revelation was written in the first century AD, the substantial catalyst that inaugurates “New Age” (Pisces) stretched out before them, describing what the future would hold. these changes. -
Binocular Double Star Logbook
Astronomical League Binocular Double Star Club Logbook 1 Table of Contents Alpha Cassiopeiae 3 14 Canis Minoris Sh 251 (Oph) Psi 1 Piscium* F Hydrae Psi 1 & 2 Draconis* 37 Ceti Iota Cancri* 10 Σ2273 (Dra) Phi Cassiopeiae 27 Hydrae 40 & 41 Draconis* 93 (Rho) & 94 Piscium Tau 1 Hydrae 67 Ophiuchi 17 Chi Ceti 35 & 36 (Zeta) Leonis 39 Draconis 56 Andromedae 4 42 Leonis Minoris Epsilon 1 & 2 Lyrae* (U) 14 Arietis Σ1474 (Hya) Zeta 1 & 2 Lyrae* 59 Andromedae Alpha Ursae Majoris 11 Beta Lyrae* 15 Trianguli Delta Leonis Delta 1 & 2 Lyrae 33 Arietis 83 Leonis Theta Serpentis* 18 19 Tauri Tau Leonis 15 Aquilae 21 & 22 Tauri 5 93 Leonis OΣΣ178 (Aql) Eta Tauri 65 Ursae Majoris 28 Aquilae Phi Tauri 67 Ursae Majoris 12 6 (Alpha) & 8 Vul 62 Tauri 12 Comae Berenices Beta Cygni* Kappa 1 & 2 Tauri 17 Comae Berenices Epsilon Sagittae 19 Theta 1 & 2 Tauri 5 (Kappa) & 6 Draconis 54 Sagittarii 57 Persei 6 32 Camelopardalis* 16 Cygni 88 Tauri Σ1740 (Vir) 57 Aquilae Sigma 1 & 2 Tauri 79 (Zeta) & 80 Ursae Maj* 13 15 Sagittae Tau Tauri 70 Virginis Theta Sagittae 62 Eridani Iota Bootis* O1 (30 & 31) Cyg* 20 Beta Camelopardalis Σ1850 (Boo) 29 Cygni 11 & 12 Camelopardalis 7 Alpha Librae* Alpha 1 & 2 Capricorni* Delta Orionis* Delta Bootis* Beta 1 & 2 Capricorni* 42 & 45 Orionis Mu 1 & 2 Bootis* 14 75 Draconis Theta 2 Orionis* Omega 1 & 2 Scorpii Rho Capricorni Gamma Leporis* Kappa Herculis Omicron Capricorni 21 35 Camelopardalis ?? Nu Scorpii S 752 (Delphinus) 5 Lyncis 8 Nu 1 & 2 Coronae Borealis 48 Cygni Nu Geminorum Rho Ophiuchi 61 Cygni* 20 Geminorum 16 & 17 Draconis* 15 5 (Gamma) & 6 Equulei Zeta Geminorum 36 & 37 Herculis 79 Cygni h 3945 (CMa) Mu 1 & 2 Scorpii Mu Cygni 22 19 Lyncis* Zeta 1 & 2 Scorpii Epsilon Pegasi* Eta Canis Majoris 9 Σ133 (Her) Pi 1 & 2 Pegasi Δ 47 (CMa) 36 Ophiuchi* 33 Pegasi 64 & 65 Geminorum Nu 1 & 2 Draconis* 16 35 Pegasi Knt 4 (Pup) 53 Ophiuchi Delta Cephei* (U) The 28 stars with asterisks are also required for the regular AL Double Star Club. -
IAU Division C Working Group on Star Names 2019 Annual Report
IAU Division C Working Group on Star Names 2019 Annual Report Eric Mamajek (chair, USA) WG Members: Juan Antonio Belmote Avilés (Spain), Sze-leung Cheung (Thailand), Beatriz García (Argentina), Steven Gullberg (USA), Duane Hamacher (Australia), Susanne M. Hoffmann (Germany), Alejandro López (Argentina), Javier Mejuto (Honduras), Thierry Montmerle (France), Jay Pasachoff (USA), Ian Ridpath (UK), Clive Ruggles (UK), B.S. Shylaja (India), Robert van Gent (Netherlands), Hitoshi Yamaoka (Japan) WG Associates: Danielle Adams (USA), Yunli Shi (China), Doris Vickers (Austria) WGSN Website: https://www.iau.org/science/scientific_bodies/working_groups/280/ WGSN Email: [email protected] The Working Group on Star Names (WGSN) consists of an international group of astronomers with expertise in stellar astronomy, astronomical history, and cultural astronomy who research and catalog proper names for stars for use by the international astronomical community, and also to aid the recognition and preservation of intangible astronomical heritage. The Terms of Reference and membership for WG Star Names (WGSN) are provided at the IAU website: https://www.iau.org/science/scientific_bodies/working_groups/280/. WGSN was re-proposed to Division C and was approved in April 2019 as a functional WG whose scope extends beyond the normal 3-year cycle of IAU working groups. The WGSN was specifically called out on p. 22 of IAU Strategic Plan 2020-2030: “The IAU serves as the internationally recognised authority for assigning designations to celestial bodies and their surface features. To do so, the IAU has a number of Working Groups on various topics, most notably on the nomenclature of small bodies in the Solar System and planetary systems under Division F and on Star Names under Division C.” WGSN continues its long term activity of researching cultural astronomy literature for star names, and researching etymologies with the goal of adding this information to the WGSN’s online materials.