1 Mem. S.A.It. Vol. 74, 556 c SAIt 2003 Memorie della One century of Solar Physics in Italy A. Righini Dipartimento di Astronomia e Scienza dello Spazio, Università di Firenze, Largo E. Fermi, I Firenze Abstract. In this paper we briefly describe the story of Solar Physics in Italy during one century and we try to evaluate its international impact. At the beginning, in the serendipitous phase, we have e relevant contribution of italian solar physicist like Secchi and Tacchini. The choice of the Abetti father and son to build in Arcetri a Solar Tower, under the technical supervision of George Ellery Hale, could have given to italian solar physics the trust to compete in the international arena. However the lack of necessary technology, the war, and the choice to use the tower for patrol of the solar chromosphere kept italian solar physics from developing at the level of its competitors at the end of the first half of the XX century. Key words. History of science Solar Physics Italy 1. Introduction Science should have no borders. However the difficulties in communications, different political regimes and research policies gave rise to national sciences at least until the end of the second World War. We can therefore speak of an Italian Solar Physics which merges in the global science in the second half of the XX century. In this paper we briefly review its history from the first works of Secchi and Donati trying to evaluate how the work of the italian scientists has been evaluated abroad. 2. Solar science in Italy in the XIX century At the beginning of the XIX century astronomers had very good tools (theoretical and observational) to speculate about solar apparent motion in the sky, solar distance and all the mechanical parameters involved in the orbital motion of the Earth, but were lacking of tools for the physical study of our nearest star. Knowledge was a privilege of few, and among those we may consider Antonio Cagnoli. Send offprint requests to: A.Righini Correspondence to: Largo E. Fermi 2, I Firenze
2 A. Righini: One century of Solar physics in Italy The physics of the sunspots Cagnoli 1, in his handbook of Astronomy titled Notizie Astronomiche (Cagnoli 1827) writes: Pende ancora fra gli astronomi la soluzione del problema: cosa sieno le macchie del Sole; e forse penderà per non breve tempo avvenire...non è quindi appieno inverisimile per quanto riguarda la congettura, che le macchie siano scorie o sostanze poco gravi fluttuanti nella materia ignea del Sole. The Notizie astronomiche were written for a cultivated reader (nobles or officers of the army), but we may consider these words as representative of the general ignorance about the facts of the Sun. The situations deeply changes in about fifty years thanks also to the work of Angelo Secchi 2 who 1 Antonio Cagnoli, astronomer, meteorologist ( ), as secretary of venetian ambassador in Paris was able to meet Lalande who introduced him to astronomy. He developed his astronomical interests using his own instrument first in Paris and than in his hometown, Verona where he built an observatory. In the year 1796 he was appointed president of the Società Italiana delle Scienze. The Repubblica Cisalpina, formed in northern Italy by Napoleone, transferred the Society in Milan and the instruments of Cagnoli were moved to the Brera Observatory. Cagnoli ended his scientific career as professor of Matematica Sublime at the military Academy in Modena. 2 Angelo Secchi S.J. ( ) born in Reggio Emilia, was educated by the Jesuits. In 1835 he is at the observatory of Collegio Romano, the Jesuit main house in Rome, as student. In the year 1848 he is in Georgetown, close to Washington working with Curley director of that astronomical Observatory. Back to Rome he succeeded in building a new and original meteorological instruments which was appraised with the Gold Medal at the Universal Expo in Due to the poor mechanical stability of the astronomical instruments at the Observatory of the Collegio Romano Secchi, as he writes, decided to study the physics of the Sun, and few months before his death, writing about his studies, he recognizes to have given a contribution to the new science of Solar reviews the results obtained in this field in a fortunate book edited first in French, in Paris, and than in Italian in Florence (Secchi 1884). This book was internationally appreciated and it may be considered the first textbook in solar physics. In this book we may find a lot of interesting details, as the description of the the structure of several spots and the discovery that sometime clouds, pink in color, were present on the spots. The obvious conclusion was that these clouds could be the same red prominences observed at the limb of the Sun during total solar eclipses. Interesting results were obtained in the year 1852 on March 19 by Angelo Secchi with a thermopile placed behind the projection plane of the Cuchoix telescope of the Osservatorio del Collegio Romano. Secchi was able to diaphragm the pinhole down to one arc minute, obtaining a ratio about two in potere calorico between the center and the limb (Secchi 1884). Secchi remarks that his measurements were the first of this type Solar Corona and the prominences Another problem on stage in the middle of the XIX century was the nature of Solar corona and the location (Sun or Moon) of solar prominences. Also in this field italian scholars, with Donati 3 and and Secchi were well in the front of the research. During the solar eclipse 1842 Arago extensively described the Corona end prominences observed during the total solar eclipse, simphysics. He was too modest, his contribution was outstanding and his fame rapidly spread out the narrow borders of Italy (Righini 1978). 3 Giovan Battista Donati ( ) studied in Pisa and in 1852 is in Florence as assistant of Giovan Battista Amici, His major achievement is the first attempt of spectral classification of stars. In 1860 he is in Spain to observe a total solar eclipse and again in Sicily for the eclipse of In 1872 he was able to dedicate the new observatory build in Arcetri, on a small hill south of Florence. (Bonelli 1971)
3 558 A. Righini: One century of Solar physics in Italy ilar observations were reported also by Vassenius since 1733 but Arago s description had a worldwide resonance. The solar eclipse in Spain, in 1860, was an excellent occasion for the astronomers coming from all Europe to observe the black sun and among them we find Secchi and Donati. Donati confirms the correspondence, between sunspots and prominences (Donati 1866). Secchi brought in Spain the Chauchoix objective of the Collegio Romano and, very wisely, did not use any anlarging device for obtaining photographic pictures of the eclipsed Sun. The focal lenght was of about two meters just allowing a good resolution on the plate. A comparison of these pictures with those obtained by De la Rue at Rivabellosa on the Atlantic side of eclipse path, clearly showed the parallax effects on the Moon but the identity of the position of the prominences, confirming that they were solar in origin Space weather The cyclic character of solar activity was well known when a large aurora was observed in 1872 in the night between February 4 and 5 in a large part of the northern hemisphere also at low latitudes. Donati was persuaded that the causes of the aurora were solar (Donati 1873) or at least cosmic. In the first printed contribution the recently inaugurated Arcetri Observatory he published the results of an inquiry on the local time of occurence of the maximum of the phenomenon as observed in diferent part of the world. He had the support of the italian ministry of foreign affairs which sent to the italian consular authorities around the world a questionnaire prepared by Donati. Answers arrived from Shanghai, Tiensin, Bombay, Taganrog, Damasco, Beirut,Saint Petersburg, Alessandria, Smirne, Tunisi, Glasgow, Cadiz, Melbourne, Santiago. From United States Donati received a detailed report from Joseph Henry, president of the Smithsonian in Washington. As a result of all these reports Donati was able to find that the maxima of the auroral phenomena propagated from east to west but they were observed at about the same local time. The conclusion of the paper was that a a new meteorology was needed that Donati defined as cosmic meteorology (we now would translate in space weather) The solar spectroscope and the Memorie degli spettroscopisti italiani It was october 20, 1868 when the news arrived in Europe that Janssen observed with the spectroscope the C line at the limb of the solar disk where the day before during a solar eclipse there was an outstanding prominence. This result opened new perspectives in prominence observations, each small refractor with just a simple spectroscope, mounted at the focal plane, could be used to observe prominences both for physical purposes and for just recording the geometrical parameters of the phenomenon. The two roman observatories: the Collegio Romano and the Campidoglio, were between the first institutions to be equipped with the spectroscope (Monaco 2000). Obviously a new observation device triggered a large amount of observational routine work not very different from that of the meteorologists and consequently the need of keeping a log. Therefore the italian community was forced to start a new scientific society and a new journal: the Memorie degli spettroscopisti Italiani which was mainly intended for the publication of the result of the spectroscopic measurements performed on the Sun, but not only. The first suggestion of founding the society degli spettroscopisti italiani was coming from Secchi as Tacchini writes in the Memorie (Tacchini 1872) il Secchi mi comunicava l idea di formare una società di Spettroscopisti Italiani, i quali lavorando di comune accordo e secondo un programma stabilito, avrebbero dato in poco tempo le richieste serie di regolari e continue osservazioni per la sicura ed accelerata soluzione
4 A. Righini: One century of Solar physics in Italy di importanti problemi relativi alla fisica solare. The international role of the italian solar spectroscopists was reflected by the structure of the Memorie. We find several papers of known foreign scholars and, sometimes, also translations of papers appeared in other journals. At the end of each volume of the Memorie it is possible to find drawings of the shape of the observed prominences and some remarkable engravings. The Memorie accepted also interesting discussions on several topics, as for instance, a project for the reform of the italian observatories, reports of solar eclipse expeditions and spectroscopic studies of wines for fraud detection The international impact of Italian Solar Physics at the end of XIX century In the year 1885 A. M. Clerke published a fortunate history of Astronomy of the XIX century (Clerke 1885). The book, although written for non scientists, is very scrupulous in the citations and therefore it is valuable to assess a criterion to evaluate the impact of the italian Solar Physics. We find quoted Secchi, Tacchini, Riccò in connection with solar arguments, other italians are, obiously, Galileo, Riccioli, Donati (for the comet and for stellar spectra), Melloni for the lunar heat, Rosetti for the temperature of the Sun and Piazzi. The total quotation referring to solar arguments are about sixty therefore we may define an impact factor 4 of about 0.07 over the universe of solar physicist quoted by A.M.Clerke. We may consider this number a very good result if we keep in mind the complex political history of Italy in the XIX century. However during large part of the XIX century solar physics was in its serendipitous phase. In this phase all that is needed is fantasy, intuition, and deep interest in observations. All these qualities are well 4 Hereinafter, we will call impact factor the ratio of quoted italians over the universe quotation in the considered review or book. present in Secchi, Tacchini 5. Riccò 6. No need of team work, and no need of large instrumentations. The research at this stage is simple, not expensive and the intelligence and personal sacrifice of single scientist are enough to obtain universally acknowledged results. The situation drastically changes in the following fifty years. 3. Solar physics in Italy in the first part of the XX century 3.1. Antonio and Giorgio Abetti Italian Solar physics is in debt with Antonio Abetti 7 of the intuition that the astronomy was changing. His younger son, Giorgio was willing to work in Astronomy and Antonio sent him several times overseas were new ideas were flourishing, especially due to the appassionate effort of George Ellery Hale, the Maestro, as Giorgio called him when he was in Mt. Wilson (Wright 1966). Giorgio met also Hale s 5 Tacchini born in Spilamberto (Modena) in 1838 was a skillful observer and a very active scientist. In 1878 he observed in India with the spectroscope the inner corona and discovered several lines in red end of the spectrum. Again Tacchini observed the coronal spectrum in 1883 in the Marquesas islands in the Souther Pacific and in many other solar eclipse expedition. He founded the Memorie degli Spettroscopisti Italiani. He died in in Born in Modena in 1844 he was director of the Catania Astrophysical Observatory, He organized several eclipse expeditions and following and with hale he tried to make photographs of the corona outside an eclipse from the ton of Etna using a spectroheliograph. He died in Antonio Abetti received a degree in engineering from the University of Padua. Than he was appointed astronomer at the observatory of that university and in 1894 becomes director of the Acetri Observatory in Firenze. Abetti s activity was essentially devoted to positional astronomy. In Arcetri he was able to carry out many observations on small planets, comets and fixed stars (Abetti 1970).
5 560 A. Righini: One century of Solar physics in Italy coworker and could work with the new instruments that Hale had built on top of the mountain; coming back to Florence, he felt that to give a new impulse to italian solar physics, a Solar Tower was needed and, as early as 1919, we find the first letters written by Antonio (director of the observatory until 1924) asking for money to start the building of the tower. 4. George Ellery Hale, Giorgio Abetti and the Arcetri Solar Tower In Arcetri a large part of the correspondence between Abetti and Hale has been preserverd and catalogued thanks to the efforts of the library staff (Baglioni et al. 1999). We shall leave that the letters talk: Hale to G. Abetti Nov I am much interested to hear of Professor Garbasso s 8 plans for astrophysical research in Arcetri, and shell be glad of any further information you can give on this subject... Hale to G. Abetti August 26, It was a great satisfaction to learn that construction of a tower telescope has been decided upon, and I am looking forward with great interest to the first draft of the tower and location, which you promised to send in the near future... Hale to G. Abetti October 10, I have cabled you to recommend that work be stopped on the well and foundations for the tower telescope, because I think a number of changes should be made in the design......in your drawing the second mirror is shown north of the coelostat, but it should be south... It is clear that Giorgio Abetti was completely dependent on Hale about the technical characteristics of the telescope, it is strange that he passed a drawing with a so big error i.e.: the secondary mirror north of the coelostat. 8 Antonio Garbasso was professor of physics at the Regio Istituto di Studi Superiori, which will become in 1926 the Università degli Studi di Firenze Hale to G. Abetti October 18, This brings the question of the design of the coelostat and second mirror...i think the scheme indicated on the enclosed blueprint is worthy of your careful consideration...one of the reasons I cabled you to advise that work be stopped was the fact that in your drawings the second mirror is shown north of the coelostat instead of south, where it should be placed, if you had put in the foundations of the tower, they would have been in the wrong position with reference to the well [I advise you not to put the foundations and build the house at foot of the tower until you have completely all the drawings of the coelostat and spectrograph (and spectroheliograph) 9 ] Hale to G. Abetti October 20, 1919 I now enclose the revised drawing, which I think is very satisfactory... Hale sends to Abetti the blue prints of the Mt. Wilson 13 foot spectroeliograph on January 20, 1920, on February 20, 1920 Hale writes to Abetti the dimensions of the optical parts. The tower was completed about 1924 and Hale writes to Abetti on October 9, I hope your spectroheliograph is now working well and am anxious to see the first results with it. The tower does not work at its best, due to the bad quality of the gratings and to the periodic errors of the driving mechanism of the spectroheliograph. Hale, however, is favorably impressed by the very preliminary results obtained by Abetti on the large Evershed downdrafts he observed above the sunspots with the spectrograph. The frontier of solar research was moving and the new problem was the measurements of magnetic fields. Abetti is very anxious to obtain some results in this field, but Hale in the letter dated November 23, 1926 writes...i doubt if you can do much work on the magnetic fields in sunspots, as your solar image is too small for any but the larger spots and the dispersion of a 13 foot soectrograph is too low. In fact, as I found with our 30 foot spectrograph, a much higher dispersion is really needed for 9 Handwritten by Hale in a typed letter.
6 A. Righini: One century of Solar physics in Italy this work, and this is why we built the large tower. Abetti was obviously not very happy of what his Maestro was writing to him and tries hard to obtain better results with the tower. Hale to Abetti October 11, the spectroheliograph pictures you sent me seem to be very good, except of for the lack of good definition. I believe however, that they are as good as I shall be able to obtain here in my solar laboratory 10, where the seeing is certainly not very promising. This letter may be considered the closing end of the early history of the Arcetri Solar tower. A blue print of an old instrument, the first solar tower of Mt. Wilson, built in Italy under the supervision of Hale and in part with the money of the Hale foundation. We must say that Abetti had great difficulties to collect all the money needed to build the tower, and that he would not be able to build a larger one. Moreover he had not the key technology, i.e.: he was not able to build gratings and he had to accept the grating that were not good for Mt. Wilson Solar Tower. How difficult was for him to put the solar tower in operation comes out clearly reading the tower logbook. The tower however played a key role in the development of Solar Physics in Italy until it was used as a research instrument and not for routine observation. 5. Solar physics in thirties of the XX century in Italy The extended and well documented review by G. Abetti (Abetti 1929) in the Handbuch der Phisik is very useful to understand the quality and the international impact of the italian solar physics at the beginning of the thirties of the XX century. The review by Abetti is comprehensive of every aspect of solar physics ad it has been universally acknowledged, in later reviews, as well documented and complete. The reference list of this review should therefore be considered, from the italian point of view, as unbiased by the language 10 In Pasadena. effect 11 and by the scarce popularity of scientific magazines in which italians were used to publish. Using this list the risk could be to overestimate the italian contribution but a punctual analysis of the papers shows the great equilibrium used by Abetti in its quotations. In Abetti s review we find about 13 % of citations referring to italian scientists (including Galileo, Secchi, and one work of Millosevich on history of Astronomy). Many of them refer to old classical solar topics as the height of solar chromosphere, the size and distribution of prominences, and some to his own work on the Evershed effect. We find some quotations also to results about the spectra of prominences obtained by Taffara (Taffara 1929) in the Solar eclipse expedition. As soon as the review proceed to describe the magnetic phenomena on the Sun we do not find any quotation of italian work. This is obvious, the Arcetri solar tower was not able to provide any result in this field, as it did in the case of the Evershed effect. At the end of Thirties Unsöld published a book (Unsöld 1938) which has been generally recognized as fundamental for a generation of astrophysicists working from the Fourties to the Fifties of XX century. We find quoted the review by Abetti in Handbuch der Physik, some other works by Abetti (Abetti 1932) and Calamai (Calamai 1934) on doppler shift of lines in prominences, a statistic on latitude drift of prominences during the solar cycle by Bocchino (Bocchino 1933), a paper by G. Righini (Righini 1935) on the center limb-variation of sodium D line, written on data obtained at the Arcetri solar Tower, and some old papers by Mascari on active regions and Riccò on prominences. We note 11 Language was a great barrier in the spreading of the scientific results obtained by italian researchers; they published in italian and mainly in the observatory series, which were exchanged by observatories, but were not so attractive for the reader as could be the Astrophysical Journal and the Zeitshrift für Astrophysik. Perhaps this provincial choice might be dictated by political constraints.
7 562 A. Righini: One century of Solar physics in Italy that in Unsöld s handbook no other italians were quoted and all those who Unsöld considered worth of quotation were solar physicists. If we want to evaluate a sort of impact factor of italian astrophysics from Unsöld point of view we do not go further than a scarce 1%. 6. Italian Solar physics at the end of the fifties of XX century In the year 1952 Gerard P. Kuiper signed the introduction to the first volume of a series of four intended to give a systematic and comprehensive account of our present knowledge concerning the sun and the other members of the solar system (Kuiper 1953). The first volume deals with the Sun, and the different topics are reviewed by outstanding personalities in their field presumably well informed on contributions given by researchers all over the world. Leo Goldberg, in the introduction on the Sun, quotes and appraises the review by Abetti (Abetti 1929) and two interesting works by Cimino (Cimino 1944) (Cimino 1946) in connection with the Secchi Rosa effect, Strömgren, in his review, dealing about the Sun as a star does not find any italian work worth to be cited, while Minnaert, reviewing the solar atmosphere quotes several works as those on the Evershed Effect (Abetti et al. 1935) or on spectral line profiles (Barocas et al. 1951), (Righini 1933), (Righini 1946) and (Rosino 1939) or on a discussion on the sharpness of solar limb(righini 1943). Van der Hulst, dealing with the Solar Corona, shows the importance of the italian activity in coronal studies, especially of the fortunate expedition in Siberia for observing the 1936 Solar Eclipse. We found quoted studies on minimum and maximum of the frequency of high latitude prominences in connection with ellipticity of coronal isophotes Abetti (1938) Biozzi (1939), while the observation of the coronal spectrum and its depression at λ 3850 Å is aknowledged, although non exclusively, to italians Doplicher (1946), Righini (1942). Also the observations by Fracastoro on the flash spectrum and on the variation of the height of the chromosphere deserve quotation (Fracastoro 1939), Fracastoro (1941). In the contribution on solar activity written by Kiepenheuer we find again quoted italian studies of the Evershed effect (Abetti 1932), about the spectra of prominence (Calamai 1934) and about the fluctuations of solar diameter (Cimino et al. 1946). In the other reviews, enclosed in the book, about line classification, radioastronomy, solar observing techniques, we do not find any quotations of italian work. 7. Conclusions Italian Solar Physics well reflects the limits of the italian scientific community in the considered period. As soon as the results of the research depend only on the quality of the single person we find outstanding achievements as in the case of Donati, Secchi, Tacchini. We find also interesting results from the systematic observations of the Sun as the studies on the height of the chromosphere and on solar diameter. When the research needs large equipments and advanced technologies, Italy is not able any more to compete (as in the case of solar magnetic fields), and researchers, if they want to succeed, the should migrate as the italian nuclear physicists did at the end of the thirties. The story of the Solar Tower in Arcetri tells that, notwithstanding the fact that the instrument was a copy of an aged prototype, it could have given results if used in a different way, i.e. as spectrograph, in that role the instrument was really outstanding ap to the beginning of the fifties. Unfortunately the tower was dedicated to the routine work of taking Ca II K and H α spectroheliograms preventing de facto its use for reseach. Acknowledgements. Part of this work was supported by Università degli Studi di Firenze. The author thanks Giannina Poletto for suggesting this work. The author also whishes to thank Antonella Gasperini and Francesca
8 A. Righini: One century of Solar physics in Italy Brunetti for their help in the search of bibliographical sources in the Arcetri Library and in the Arcetri historical archive. References Abetti G Solar Physics in Hanbuch der Astrophysik, 6, 57 Abetti, G Publ. R. Osserv. Arcetri, 50, 47 Abetti G Dictionary of scientific biography, 1, 19 Schribner s, New York Abetti G, Castelli, R Pub. R. Osserv. Arcetri, 53, 25 Abetti G Pub. R. Osserv. Arcetri, 56, 53 Baglioni R., Gasperini, A., Grisendi, T. Arcetri Technical report 3/99 Barocas V. Righini G Ap, J., 114, 443 Biozzi M Pub. R. Oss. Arcetri, 57, 5 Bocchino G. 1933, Publ. R. Osserv. Arcetri, 51 Bonelli M.L Dictionary of scientific biography, 4, 161 Schribner s, New York Cagnoli A. 1827, Notizie astronomiche di Antonio Cagnoli adattate all uso comune Reggio, per Pietro Fiaccadori Calamai G Pub. Oss. Arcetri, 52, 39 Cimino M Comm.Pont. Acad. Sci., 8, 485 Cimino M Atti Acad. naz. Lincei, 1, 624 Cimino M., Armellini G Proc. Nat. Acad., 1, 624 Clerke A.M. 1885, A popular history of Astronomy during the nineteenth century, Adam & Charles Black, Edimburgh Donati G.B. 1866, Annali R. Museo di Fisica e Storia Naturale per il 1865, Firenze Donati G.B. 1873, Pub. Oss. Arcetri, 1 Doplicher, V Atti Acad. Naz dei Lincei, cl. sci. fis. ser VIII, 1, 63 Kuiper G The Sun The University of Chicago Press, Chicago Fracastoro M.G Reale Accad. d Italia Rend. cl. sci. fis., 1, 134 Fracastoro M.G Reale Accad. d Italia Rend. cl. sci. fis., 2, 979 Monaco G L astronomia a Roma, dalle origini al novecento Pubbl. Osservatorio Astronomico di Roma Righini G Publ. R. Osserv. Arcetri, 51, 57 Righini G.: 1935, ZS. f. Ap., 10, 344 Righini G Zs, f. Ap, 21, 158 Righini G Publ. R. Osserv. Arcetri, 61, 67 Righini G, 1946 Publ. R. Osserv. Arcetri, 63, 61 Righini G Padre Angelo Secchi: lo scienziato, commemorazione nel centenario della morte, lecture given in Reggio Emilia, Feb. 2, 1978 Rosino L. 1939, Mem, Soc, Astron. It., 12, 233 Secchi A Il Sole, Firenze Tacchini P Mem, Soc. Spett. It., 1, 1 Taffara L Mem, Soc. Astr. It., 4, 395 Unsöld A Physik der Sternatmosphären, Berlin, Verlag von Julius Springer Wright H Explorer of the Universe, a biography of George Ellery Hale, E.P. Dutton & Co., Inc., New York
Mem. S.A.It. Vol. 82, 253 c SAIt 2011 Memorie della G. V. Schiaparelli and the Arcetri Observatory S. Bianchi, D. Galli, and A. Gasperini Istituto Nazionale di Astrofisica Osservatorio Astrofisico di Arcetri,
Visions of the Universe ~ Four Centuries of Discovery S torms on thes un supplemental materials Storms on the Sun Table of Contents - Exhibit Overview... 3 Science Background... 4 Science Misconceptions...
Science Standard 4 Earth in Space Grade Level Expectations Science Standard 4 Earth in Space Our Solar System is a collection of gravitationally interacting bodies that include Earth and the Moon. Universal
AST 105 HW # Solution Week of September 1 th, 2015 Note: All Problems are from The Cosmic Perspective (6ed) Chapter 6 Review Problems 2. For purposes of astronomy, what advantages does a camera have over
CHAPTER 9: STARS AND GALAXIES Characteristics of the Sun 1. The Sun is located about 150 million kilometres from the Earth. 2. The Sun is made up of hot gases, mostly hydrogen and helium. 3. The size of
Bull. Astr. Soc. India (2005) 33, 27 33 Mass limit on Nemesis Varun Bhalerao 1 and M.N. Vahia 2 1 Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India 2 Tata Institute of Fundamental Research,
SYLLABUS FORM WESTCHESTER COMMUNITY COLLEGE Valhalla, NY l0595 l. Course #:PHYSC 151 2. NAME OF ORIGINATOR /REVISOR: PAUL ROBINSON NAME OF COURSE: ASTRONOMY 3. CURRENT DATE: OCTOBER 26, 2011. Please indicate
MARY WARD CATHOLIC SECONDARY SCHOOL Centre for Self-Directed Learning Grade 9 Academic Science (SNC 1D1) Unit # 15: ASTRONOMY The Sun, the Stars, & Planets Unit Last Revised: March 2013 ACTIVITY DESCRIPTION
Our Sun: the view from outside 1. The Sun is hot. Really hot. The visible "surface" of the Sun, called the photosphere, has a temperature of about 5800 Kelvin. That's equivalent to roughly 10,000 Fahrenheit.
Name/Number: Part A: Define the following terms: Earth, Moon and Sun Study Guide Date: satellite: an object that moves around another object in space; the moon is a satellite of the Earth orbit: the path
Chapter 3 The Science of Astronomy Days of the week were named for Sun, Moon, and visible planets. What did ancient civilizations achieve in astronomy? Daily timekeeping Tracking the seasons and calendar
A short history of telescopes and astronomy: Galileo to the TMT Telescopes in the last 400 years Galileo 1608 Hans Lippershey applied for a patent for seeing things far away as if they were nearby 1609
Safely Observing the Sun for Yourself Never look directly at the Sun with your eyes or through a telescope or in any other way, unless you have the proper filters. The Great American Eclipse of 2017 On
710L At the Intersection of Faith and Science BY MICHELLE FEDER, ADAPTED BY NEWSELA THE VATICAN OBSERVATORY THE POPE S VACATION HOME IS CASTEL GANDOLFO, OUTSIDE ROME. THIS QUIET MONASTERY SITS ON A HILL.
OVERVIEW More than ever before, Physics in the Twenty First Century has become an example of international cooperation, particularly in the areas of astronomy and cosmology. Astronomers work in a number
This transcript accurately records the words and pauses of the speaker(s) in the audio/video. Because spoken English can be different than written English, the transcript does not always follow rules of
The Lombardia Region Exploratorium Project 19 October 2011 -Turin 1 Space Exploration Promotion what why who Incentive the Public Interest Introduction to Space Science and Engineering Understand the Space
Using a spectrohelioscope to observe the sun's corona One of the most inspiring natural spectacles is that of the fiery prominences that shoot out from the surface of the sun. It is unfortunate that most
Two Small Pieces of Glass: The Amazing telescope Teachers Guide The purpose of this guide is to integrate some of the information from the program into your classroom before and after your students view
CELESTIAL MOTIONS Stars appear to move counterclockwise on the surface of a huge sphere the Starry Vault, in their daily motions about Earth Polaris remains stationary. In Charlottesville we see Polaris
1 2 Contents of Talk What is up there? Moon, stars, planets, comets, aurora, nebulae, galaxies How can I find my way around? Magazines, books, planisphere, software What if I want to see more? Binoculars,
A date with Mercury over Sun - Mercury Transits on Monday, 9 th May 2016 A rare celestial event to explore the inner planet Astronomy teaches us to look upwards. It is the study and understanding of the
An approach to accreditation: the path of the Italian Higher Education Carlo Calandra Buonaura CNVSU Board and University of Modena and Reggio Emilia, firstname.lastname@example.org Primiano Di Nauta CNVSU Technical
Andrea Pedeferri Curriculum Vitae Personal Data 3601 Greenway apt 811 21218 Baltimore, MD USA +1 443 850 0092 email@example.com http://departments.columbian.gwu.edu/philosophy/people/172 Areas of Specializations
The Internationalization and the Royal Academy of Italy!! working partnerships with the International Union of Academies, with the International Institute for Intellectual Cooperation,! support guaranteed
248 Teaching Astronomy: Why and How? John R. Percy Erindale Campus, and Department of Astronomy, University of Toronto, Mississauga, Ontario, Canada L5L 1C6 Abstract This paper, delivered to an audience
Observing the Universe Stars & Galaxies Telescopes Any questions for next Monday? Light Doppler effect Doppler shift Doppler shift Spectra Doppler effect Spectra Stars Star and planet formation Sun Low-mass
Merit Badge Workbook This workbook can help you but you still need to read the merit badge pamphlet. The work space provided for each requirement should be used by the Scout to make notes for discussing
Ch 6: Light and Telescope Wave and Wavelength..\..\aTeach\PhET\wave-on-a-string_en.jar Wavelength, Frequency and Speed Wave and Wavelength A wave is a disturbance that moves through a medium or through
There is a theory which states that if ever anybody discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.
Notes for teachers on Module 3 Lenses and Telescopes Lenses are a basic optical component. However, understanding how they work is non-trivial! They have a wide variety of applications. One such use is
TEACHING OF STATISTICS IN NEWLY INDEPENDENT STATES: THE CASE OF KAZAKSTAN Guido Ferrari, Dipartimento di Statistica G. Parenti, Università di Firenze, Italy The aim of this report is to discuss the state
The Universe is thought to consist of trillions of galaxies. Our galaxy, the Milky Way, has billions of stars. One of those stars is our Sun. Our solar system consists of the Sun at the center, and all
Stony Brook University Caltech Palomar Observatory Partnership Proposal Stanimir Metchev, Jin Koda, Frederick Walter, Michal Simon Department of Physics & Astronomy, Stony Brook University, NY 11794 and
One Stop Shop For Educators The following instructional plan is part of a GaDOE collection of Unit Frameworks, Performance Tasks, examples of Student Work, and Teacher Commentary. Many more GaDOE approved
Chapter 8, Astronomy Model some of the ways in which scientists observe the planets. Relate evidence that Earth rotates and define revolution. Scientists use many tools to observe and study the universe.
Light Telescopes Grade Level: 5 Time Required: Suggested TEKS: Science - 5.4 Suggested SCANS Information. Acquires and evaluates information. National Science and Math Standards Science as Inquiry, Earth
2016-2017 Curriculum Catalog 2016 Glynlyon, Inc. Table of Contents GENERAL SCIENCE COURSE OVERVIEW... 1 UNIT 1: WHAT IS SCIENCE?... 1 UNIT 2: PERCEIVING THINGS... 1 UNIT 3: EARTH IN SPACE (1)... 2 UNIT
Astro 130, Fall 2011, Homework, Chapter 17, Due Sep 29, 2011 Name: Date: 1. If stellar parallax can be measured to a precision of about 0.01 arcsec using telescopes on Earth to observe stars, to what distance
Lech Mankiewicz Centre for Theoretical Physics, Polish Academy of Sciences, Warsaw, Global Intelligent Robotic Telescopes Network GLORIA http://www.gloria-project.eu/ Paweł Rudawy Astronomical Institute,
Supercool Space Tools! By Linda Hermans-Killam A long time ago, people looked into the dark night sky and wondered about the stars, meteors, comets and planets they saw. The only tools they had to study
The Sun ASTR 101 11/14/2016 1 Radius: 700,000 km (110 R ) Mass: 2.0 10 30 kg (330,000 M ) Density: 1400 kg/m 3 Rotation: Differential, about 25 days at equator, 30 days at poles. Surface temperature: 5800
386 ASTRONOMY: H. SHAPLEY PROC. N. A. S.' ON THE RELATIVE VELOCITY OF BLUE AND YELLOW LIGHT By HARioW SHAPLEY HARvARD COLLIGM OBSICRVATORY, CAMBRIDGES, MASSACHUSETTS Communicated, September 24, 1923 The
Merit Badge Workbook This workbook can help you but you still need to read the merit badge pamphlet. The work space provided for each requirement should be used by the Scout to make notes for discussing
Astronomy Review Use the following four pictures to answer questions 1-4. 1. Put an X through the pictures that are NOT possible. 2. Circle the picture that could be a lunar eclipse. 3. Triangle the picture
Tools of Astronomy Notes Light is a form of electromagnetic radiation. Scientists call the light you can see visible light. If you shine white light through a prism, the light spreads out to make a range
6.E.1 Unit Test DO NOT WRITE ON THIS QUIZ!!! 1. The largest body in our solar system is Earth. the Sun. Jupiter. the Moon. 4. What do the four planets closest to the Sun have in common? Their solid, rocky
SOLAR SPECTROSCOPY FOR THE AMATEUR By David Lyon With the increasing availability of commercially made telescopes, many new amateur astronomers are missing the optical basics of the hobby. The construction
Study Guide: Solar System 1. How many planets are there in the solar system? 2. What is the correct order of all the planets in the solar system? 3. Where can a comet be located in the solar system? 4.
PISTOLETTO BEFORE THE MIRROR PISTOLETTO BEFORE THE MIRROR CONTENTS Michelangelo and Dante (English translation) 7 Plates 15 Michelangelo Pistoletto Biography 71 Works. Exhibition history and bibliography
Chapter 2 Early Instruments William Herschel began his telescope-making career in 1773 by experimenting with relatively small refractors (small in aperture, but certainly not in length one of them being
Wallingford Public Schools - HIGH SCHOOL COURSE OUTLINE Course Title: Astronomy I Course Number: A 2113 Department: Science Grade(s): 10-12 Level(s): Academic Credit: 1/2 Course Description This course
National Aeronautics and Space Administration Einstein Rings: Nature s Gravitational Lenses Leonidas Moustakas and Adam Bolton Taken from: Hubble 2006 Science Year in Review The full contents of this book
The Scale of the Universe Some Introductory Material and Pretty Pictures The facts we know today will be the same tomorrow but today s theories may tomorrow be obsolete. A scientific theory is regarded
Proc. of the International Symposium on the NAOJ Museum September 2015 in Tokyo, Japan Gunma Astronomical Observatory, a Public Observatory with a Large Telescope Osamu HASHIMOTO 1, Satoru YAMANO 1 and
Meeting of the Mongolian Mathematical Society September 15th 2015 Francesco Pappalardi Dipartimento di Matematica e Fisica Università Roma Tre http://www.mat.uniroma3.it/users/pappa/ Mathematics Institutions
NICOLA AMENDOLA CURRICULUM VITAE PERSONAL E-mail: Web Site: Office: firstname.lastname@example.org http://www.economia.uniroma2.it/amendola.htm Dipartimento di Economia e Istituzioni Università di Roma Tor
Key Idea Which Satellite am I? A satellite is any object (natural or man-made) that orbits around a planet in a regular way. Orbits can be circular or elliptical which is a sort of oval shape, and is really
Instructor Information Name Office Email Office Hours Course Information ASTR 100 Introduction to Astronomy Syllabus for Fall 2015 Prof. Emily Hardegree-Ullman 125 Astronomy email@example.com Tuesdays
The Mars Hoax Every two years or so, email accounts bristle with messages breathlessly announcing that observing Mars this fall will be a once in a lifetime experience. This email was close to the truth
Motions of the Earth Stuff everyone should know Earth Motions E W N W Noon E Why is there day and night? OR Why do the Sun and stars appear to move through the sky? Because the Earth rotates around its
Unit 4 The Solar System Chapter 7 ~ The History of the Solar System o Section 1 ~ The Formation of the Solar System o Section 2 ~ Observing the Solar System Chapter 8 ~ The Parts the Solar System o Section
Earth In Space Unit Diagnostic Assessment: Students complete a questionnaire answering questions about their ideas concerning a day, year, the seasons and moon phases: My Ideas About A Day, Year, Seasons
Chapter 13 Other Planetary Systems: The New Science of Distant Worlds 13.1 Detecting Extrasolar Planets Our goals for learning: Why is it so difficult to detect planets around other stars? How do we detect
CONNECTED, LEVEL 3 2013, Food for Thought Why Is the Moon Upside Down? by Trish Puharich Overview This article explore how three friends made observations of the phases of the Moon from different locations.
NATIONAL ACADEMY OP SCIENCES BIOGRAPHICAL MEMOIRS PART OF VOLUME VIII BIOGRAPHICAL MEMOIR OF MIERS FISHER LONGSTRETH 1819-1891 REBECCA C. LONGSTRETH PRESENTED TO THE ACADEMY AT THE ANNUAL MBETINO, I914
Astronomy 12 Unit Test Review Charting the Sky Astronomer: Part I- Multiple choice: Answer each question by shading the most appropriate bubble. 01. Astronomy is the study of a. the stars and planets and
HELIOSTAT II - MEASURING THE SOLAR ROTATION SYNOPSIS: In this lab you will map sunspots, and from the movement of the spots over several days, you will determine the rotation rate of the Sun. EQUIPMENT:
What Are Stars? How are stars formed? Stars are formed from clouds of dust and gas, or nebulas, and go through different stages as they age. star: a large celestial body that is composed of gas and emits
Science Olympiad Astronomy Multiple Choice: Choose the best answer for each question. Each question is worth one point. In the event of a tie, there will be a tie-breaking word problem. 1) The final phase
Teacher: Sherry Tipps-Holder Grade: 8 Subject: World History/ Lesson designed for inclusion in unit on Scientific Revolution Essential Question: What were the major contributions/innovations of the who
The Moon as a Common Reference for Sensor Cross-Comparison Thomas C. Stone U.S. Geological Survey, Flagstaff AZ, USA CEOS IVOS Workshop JRC Ispra, Italy 18 20 October 2010 The Moon as a source lunar calibration
The Moon's Orbit The first part of this note gives reference information and definitions about eclipses , much of which would have been familiar to ancient Greek astronomers, though not necessarily
2 EDWIN HUBBLE BIOGRAPHY 720L EDWIN HUBBLE EVIDENCE FOR AN EXPANDING UNIVERSE Born November 20, 1889 Marshfield, Missouri Died September 28, 1953 San Marino, California By Cynthia Stokes Brown, adapted
Month September 2016-2017 Curriculum Map: 7th Grade Science October Unit Human Impact on the Environment Astronomy: Cosmology What is the Earth's place in the universe? Essential Questions (List 1-3 Essential
LESSON 3 THE SOLAR SYSTEM Chapter 8, Astronomy OBJECTIVES Identify planets by observing their movement against background stars. Explain that the solar system consists of many bodies held together by gravity.
Chapter 13 Lecture The Cosmic Perspective Seventh Edition Other Planetary Systems: The New Science of Distant Worlds 13.1 Detecting Planets Around Other Stars Our goals for learning: Why is it so challenging