A 'Catchers Tale' the 'Leviathan Lord'
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Telescopes and Binoculars
Continuing Education Course Approved by the American Board of Opticianry Telescopes and Binoculars National Academy of Opticianry 8401 Corporate Drive #605 Landover, MD 20785 800-229-4828 phone 301-577-3880 fax www.nao.org Copyright© 2015 by the National Academy of Opticianry. All rights reserved. No part of this text may be reproduced without permission in writing from the publisher. 2 National Academy of Opticianry PREFACE: This continuing education course was prepared under the auspices of the National Academy of Opticianry and is designed to be convenient, cost effective and practical for the Optician. The skills and knowledge required to practice the profession of Opticianry will continue to change in the future as advances in technology are applied to the eye care specialty. Higher rates of obsolescence will result in an increased tempo of change as well as knowledge to meet these changes. The National Academy of Opticianry recognizes the need to provide a Continuing Education Program for all Opticians. This course has been developed as a part of the overall program to enable Opticians to develop and improve their technical knowledge and skills in their chosen profession. The National Academy of Opticianry INSTRUCTIONS: Read and study the material. After you feel that you understand the material thoroughly take the test following the instructions given at the beginning of the test. Upon completion of the test, mail the answer sheet to the National Academy of Opticianry, 8401 Corporate Drive, Suite 605, Landover, Maryland 20785 or fax it to 301-577-3880. Be sure you complete the evaluation form on the answer sheet. -
A Newly-Discovered Accurate Early Drawing of M51, the Whirlpool Nebula
Journal of Astronomical History and Heritage , 11(2), 107-115 (2008). A NEWLY-DISCOVERED ACCURATE EARLY DRAWING OF M51, THE WHIRLPOOL NEBULA William Tobin 6 rue Saint Louis, 56000 Vannes, France. E-mail: [email protected] and J.B. Holberg Lunar and Planetary Laboratory, University of Arizona, 1541 East University Boulevard, Tucson, AZ 85721, U.S.A. E-mail: [email protected] Abstract: We have discovered a lost drawing of M51, the nebula in which spiral structure was first discovered by Lord Rosse. The drawing was made in April 1862 by Jean Chacornac at the Paris Observatory using Léon Foucault’s newly-completed 80-cm silvered-glass reflecting telescope. Comparison with modern images shows that Chacornac’s drawing was more accurate with respect to gross structure and showed fainter details than any other nineteenth century drawing, although its superiority would not have been apparent at the time without nebular photography to provide a standard against which to judge drawing quality. M51 is now known as the Whirlpool Nebula, but the astronomical appropriation of ‘whirlpool’ predates Rosse’s discovery. Keywords: reflecting telescopes, nebulae, spiral structure, Léon Foucault, Lord Rosse, M51, Whirlpool Nebula 1 REFLECTING TELESCOPES AND SPIRAL STRUCTURE The French physicist Léon Foucault (1819–1868) is the father of the reflecting telescope in its modern form, with large, optically-perfect, metallized glass or ceramic mirrors. Foucault achieved this breakthrough while working as ‘physicist’ at the Paris Observatory in the late 1850s. The largest telescope that he built (Foucault, 1862) had a silvered-glass, f/5.6 primary mirror of 80-cm diameter in a Newtonian configura- tion (see Figure 1). -
Aplea for Reflectors
A PLEA FOR REFLECTORS Pedro RÉ http://pedroreastrophotography.com/ In 1867 John Browing (c1833-1925)1 published a trade catalogue entitled “A Plea for Reflectors: Being a Description of the New Astronomical Telescopes with Silvered-Glass Specula; And Instructions for adjusting and Using Them”. This catalogue had six editions that were published until 18762. Browning describes his range of reflecting telescopes, how to use them and compares these with achromatic refractors of comparable apertures. It also contains numerous details of its extensive range of glass silvered specula, eyepieces, micrometres, barometers and microscopes (Figure 1). The back of the booklet contains testimonials from satisfied customers, many of them distinguished amateurs and professionals. By publishing “A Plea for Reflectors”, J. Browning & Co. became one of the first to mass produce telescopes for the amateur (Figure 2). The popularity of the Newtonian reflector as the instrument of choice for the amateur astronomer followed the pioneering work of George Henry With (1827-1904). With began making silvered-glass mirrors in the early 1860's following his retirement as schoolmaster at the Blue Coat School, Hereford. With did not actually make telescopes. His principal customer was John Browning, the London instrument maker well-known for his spectroscopes and telescopes. Browning's business flourished to circa 1905, possibly first starting at 1 Norfolk Street, Strand circa 1866. The firm had their 'factory' in Vine Street EC3 (1872-76) and Southampton Street north off the Strand (1877-82) and William Street (1887). The shop was at 111 Minories (near Tower Hill) working under the name Spencer, Browning and Co. -
The Herschels and Their Astronomy
The Herschels and their Astronomy Mary Kay Hemenway 24 March 2005 outline • William Herschel • Herschel telescopes • Caroline Herschel • Considerations of the Milky Way • William Herschel’s discoveries • John Herschel Wm. Herschel (1738-1822) • Born Friedrich Wilhelm Herschel in Hanover, Germany • A bandboy with the Hanoverian Guards, later served in the military; his father helped him to leave Germany for England in 1757 • Musician in Bath • He read Smith's Harmonies, and followed by reading Smith's Optics - it changed his life. Miniature portrait from 1764 Discovery of Uranus 1781 • William Herschel used a seven-foot Newtonian telescope • "in the quartile near zeta Tauri the lowest of the two is a curious either Nebulous Star or perhaps a Comet” • He called it “Georgium Sidus" after his new patron, George Ill. • Pension of 200 pounds a year and knighted, the "King's Astronomer” -- now astronomy full time. Sir William Herschel • Those who had received a classical education in astronomy agreed that their job was to study the sun, moon, planets, comets, individual stars. • Herschel acted like a naturalist, collecting specimens in great numbers, counting and classifying them, and later trying to organize some into life cycles. • Before his discovery of Uranus, Fellows of the Royal Society had contempt for his ignorance of basic procedures and conventions. Isaac Newton's reflecting telescope 1671 William Herschel's 20-foot, 1783 Account of some Observations tending to investigate the Construction of the Heavens Philosophical Transactions of the Royal Society of London (1784) vol. 74, pp. 437-451 In a former paper I mentioned, that a more powerful instrument was preparing for continuing my reviews of the heavens. -
Extragalactic Astronomy
Astrophysics and Space Science Library 435 Mauro D’Onofrio Roberto Rampazzo Simone Zaggia Editors From the Realm of the Nebulae to Populations of Galaxies Dialogues on a Century of Research From the Realm of the Nebulae to Populations of Galaxies Astrophysics and Space Science Library EDITORIAL BOARD Chairman W. B. BURTON, National Radio Astronomy Observatory, Charlottesville, Virginia, U.S.A. ([email protected]); University of Leiden, The Netherlands ([email protected]) F. BERTOLA, University of Padua, Italy C. J. CESARSKY, Commission for Atomic Energy, Saclay, France P. EHRENFREUND, Leiden University, The Netherlands O. ENGVOLD, University of Oslo, Norway A. HECK, Strasbourg Astronomical Observatory, France E. P. J. VAN DEN HEUVEL, University of Amsterdam, The Netherlands V. M. KASPI, McGill University, Montreal, Canada J. M. E. KUIJPERS, University of Nijmegen, The Netherlands H. VAN DER LAAN, University of Utrecht, The Netherlands P. G. MURDIN, Institute of Astronomy, Cambridge, UK B. V. SO M OV, Astronomical Institute, Moscow State University, Russia R. A. SUNYAEV, Space Research Institute, Moscow, Russia More information about this series at http://www.springer.com/series/5664 Mauro D’Onofrio • Roberto Rampazzo • Simone Zaggia Editors From the Realm of the Nebulae to Populations of Galaxies Dialogues on a Century of Research 123 Editors Mauro D’Onofrio Roberto Rampazzo Department of Physics and Astronomy INAF–Osservatorio Astronomico University of Padova di Padova Italy Padova, Italy Simone Zaggia INAF–Osservatorio Astronomico di Padova Padova, Italy ISSN 0067-0057 ISSN 2214-7985 (electronic) Astrophysics and Space Science Library ISBN 978-3-319-31004-6 ISBN 978-3-319-31006-0 (eBook) DOI 10.1007/978-3-319-31006-0 Library of Congress Control Number: 2016946611 © Springer International Publishing Switzerland 2016 This work is subject to copyright. -
The Production of Metal Mirrors for Use in Astronomy
The Production of Metal Mirrors for use in Astronomy A Thesis Submitted to the University of London for the Degree of Doctor of Philosophy by David Brooks UCL Optical Science Laboratory Department of Physics and Astronomy University College London 2001 ProQuest Number: U643140 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest. ProQuest U643140 Published by ProQuest LLC(2015). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States Code. Microform Edition © ProQuest LLC. ProQuest LLC 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106-1346 The Production of Metal Mirrors for use in Astronomy Abstract This thesis demonstrates the possibility of manufacturing larger mirrors from nickel coated aluminium with a considerable cost and risk benefits compared to zero expansion glass ceramic or borosilicate. Constructing large mirrors from aluminium could cut the cost of production by one third. A new generation of very large telescopes is being designed, on the order of 100 meters diameter. The proposed designs are of mosaic type mirrors similar to the Keck Telescope primary. The enormous mass of glass required inhibits the construction, simply by its cost and production time. Very little research has been done on the processes involved in the production of large metal mirrors. -
Prime Focus (04-08)
Highlights of the April Sky. -- -- -- 2nd -- -- -- The Moon below Neptune at dawn. PPrime Focuss -- -- -- 4th -- -- -- A Publication of the Kalamazoo Astronomical Society Venus near a very thin Moon, look east about 20 minutes before sunrise. April 2008 -- -- -- 5th -- -- -- New Moon 11:55 pm EDT ThisThis MonthsMonths KAS EventsEvents -- -- -- 8th -- -- -- The Moon occults the Pleiades, 10 pm. General Meeting: Friday, April 4 @ 7:00 pm -- -- -- 12thth -- -- -- Kalamazoo Math & Science Center - See Page 10 for Details The Moon less than 2º ofof Mars after midnight. Observing Session: Saturday, April 5 @ 8:00 pm First Quarter Moon Saturn & Orion Nebula - Kalamazoo Nature Center 2:32 pm EDT thth Astronomy Day: Saturday, April 19 @ 10:00 am -- -- -- 14 -- -- -- Moon is right of Saturn Kalamazoo Nature Center - See Page 3 for Details and Regulus after dusk. -- -- -- 19th -- -- -- Observing Session: Saturday, April 19 @ 8:00 pm The Moon is 4º oror 55º belowbelow Saturn & Full Moon - Kalamazoo Nature Center Spica at dusk. -- -- -- 20th -- -- -- Full Moon 6:25 am EDT Inside the Newsletter. Inside the Newsletter. -- -- -- 22nd -- -- -- Lyrid meteor shower peaks March Meeting Minutes.........................p. 2 (10--20 meteors per hour). Board Meeting Minutes......................... p. 3 -- -- -- 23rd -- -- -- Astronomy Day 2008............................ p. 3 The Moon south of Antares before dawn. KAS Online Redesign Underway........ p. 4 Turtles and the Speed of Light............ p. 4 -- -- -- 27th -- -- -- The Moon passes 4º southsouth Rhea Also May Have Rings................... p. 5 of Jupiter, 4 am. NASA Space Place.................................. p. 6 -- -- -- 28thth -- -- -- Membership of the KAS........................p. 7 Last Quarter Moon 10:12 am EDT April Night Sky........................................ p. 8 Mars passes 5º southsouth ofof KAS Officers & Announcements....... -
Rosse Papers Summary List: 17Th Century Correspondence
ROSSE PAPERS SUMMARY LIST: 17TH CENTURY CORRESPONDENCE A/ DATE DESCRIPTION 1-26 1595-1699: 17th-century letters and papers of the two branches of the 1871 Parsons family, the Parsonses of Bellamont, Co. Dublin, Viscounts Rosse, and the Parsonses of Parsonstown, alias Birr, King’s County. [N.B. The whole of this section is kept in the right-hand cupboard of the Muniment Room in Birr Castle. It has been microfilmed by the Carroll Institute, Carroll House, 2-6 Catherine Place, London SW1E 6HF. A copy of the microfilm is available in the Muniment Room at Birr Castle and in PRONI.] 1 1595-1699 Large folio volume containing c.125 very miscellaneous documents, amateurishly but sensibly attached to its pages, and referred to in other sub-sections of Section A as ‘MSS ii’. This volume is described in R. J. Hayes, Manuscript Sources for the History of Irish Civilisation, as ‘A volume of documents relating to the Parsons family of Birr, Earls of Rosse, and lands in Offaly and property in Birr, 1595-1699’, and has been microfilmed by the National Library of Ireland (n.526: p. 799). It includes letters of c.1640 from Rev. Richard Heaton, the early and important Irish botanist. 2 1595-1699 Late 19th-century, and not quite complete, table of contents to A/1 (‘MSS ii’) [in the handwriting of the 5th Earl of Rosse (d. 1918)], and including the following entries: ‘1. 1595. Elizabeth Regina, grant to Richard Hardinge (copia). ... 7. 1629. Agreement of sale from Samuel Smith of Birr to Lady Anne Parsons, relict of Sir Laurence Parsons, of cattle, “especially the cows of English breed”. -
Transit0711.Pdf
TRANSIT The July/August 2011 Newsletter of NEXT MEETING: NEW SEASON 9 September 2011, 7.15 pm for a 7.30 pm start Wynyard Planetarium Galaxies in massive clusters Dr John Stott, Durham University Contents p.2 Editorial Observation reports & planning p.2 Skylights – July 2011 Rob Peeling p.4 A recent supernova in the Whirlpool Galaxy Jürgen Schmoll p.5 A gallery of noctilucent clouds Peter Heath, Keith Johnson, Ed Restall, Jürgen Schmoll General articles p.7 Another trip into history: The Leviathan of Parsonstown Neil Haggath p.12 UFOs, space and sanity Andy Fleming p.17 Snippets John Crowther The Transit quiz p. 18 Answers to June's quiz p. 19 The summer's (longer) quiz 1 Editorial Rod Cuff As befits a summer publication, this issue includes a 'What I did on my holidays' article from Neil's trip to Ireland (page 7); and it has a timely astronomical link with a recent event captured photographically by Jürgen (page 4). Although the light summer nights don't lend themselves to easy observation of the night skies, several indefatigable photographers stayed awake and alert late into the night and early morning to record some excellent displays of noctilucent clouds at the end of June and the beginning of July, recorded in a gallery starting on page 5. Congratulations and good wishes from us all, I'm sure, to Rob Peeling on getting himself and his family moved in to their new home in southern England. We shall and do miss him, but for now at least we're still benefitting from his welcome Skylights (page 2). -
News from the Tr Unk Thursday, November 8, 2018
n e w s news from the tr unk Thursday, November 8, 2018 PLEASE NOTE: Thursday, November 15, 2018 is Early Dismissal at 12:00pm. Halloween at KAS PLEASE NOTE: The PTA Picnic will take place on November, 9, 2018 starting from 2:00pm to 8:00pm. Also the pool will be closed on that day from 2:00pm. Superintendent’s Message Letter from the Middle & High School Principal Parent Conferences Thank you to all parents who attended Parent/Teacher conferences Dear Parents, yesterday. These conferences are very important for building strong It was great seeing so many of you on Parent–Teacher Conference relationships between teachers and parents in helping children to Day. Children do better in school when parents are involved. progress and succeed in all areas at school. Attending parent–teacher conferences is one of the best ways to be involved in your child’s education and help your child succeed. KAS IT Infrastructure Parent–teacher conferences are a great opportunity to discuss your One of the important upgrades at KAS this school year has been child's progress and to work with the teacher to help your child do the $200,000.00 capital investment in our school wide IT system. well in school. This has allowed much faster and more reliable internet access for Now that Parent–Teacher Conferences are over, please review what everyone. In the past we have suffered too many delays and slow was discussed at the conference with your child, including any internet access during periods of high usage. This no longer special learning plans, and share the positive comments the teach- happens. -
Prime Focus (05-18)
Highlights of the May Sky - - - 2nd - - - DUSK: Aldebaran and Venus, separated by about 6°, set together in the west-northwest. - - - 4th - - - AM: A waning gibbous Moon, Saturn, and Lambda Sagittarii (top star of the Teapot asterism in Sagittarius) form a triangle. - - - 7th - - - KAS Last Quarter Moon 10:09 pm EDT General Meeting: Friday, May 4 @ 7:00 pm - - - 8th - - - Jupiter is at opposition. Kalamazoo Area Math & Science Center - See Page 4 for Details - - - 15th - - - New Moon Observing Session: Saturday, May 5 @ 9:00 pm 7:48 am EDT Venus, Jupiter & Spring Galaxies - Kalamazoo Nature Center - - - 17th - - - DUSK: Only 6° separate a thin Observing Session: Saturday, May 19 @ 9:00 pm crescent Moon and Venus. Moon, Venus & Jupiter - Kalamazoo Nature Center - - - 19th - - - PM: The Moon is 6° below the Board Meeting: Sunday, May 20 @ 5:00 pm Beehive Cluster (M44). Sunnyside Church - 2800 Gull Road - All Members Welcome - - - 20th - - - DUSK: Venus is less than 1° right of the open cluster M35 in Gemini. - - - 21st - - - Inside the Newsletter. PM: The Moon and Regulus are less than 1° apart. April Meeng Minutes....................... p. 2 First Quarter Moon 11:49 pm EDT Board Meeng Minutes..................... p. 2 - - - 25th - - - Observaons...................................... p. 3 PM: Spica, in Virgo, and a waxing gibbous Moon are only NASA Space Place.............................. p. 3 6° apart. General Meeng Preview.................. p. 4 - - - 26th - - - PM: The Moon, Jupiter, and Counng Stars.................................... p. 5 Spica form a long triangle. The King of Spring.............................. p. 6 - - - 29th - - - May Night Sky.................................... p. 12 Full Moon 10:20 am EDT KAS Board & Announcements............ p. 13 - - - 31st - - - Miller Planisphere............................. -
Read a Sample
Spiral Structure in Galaxies Spiral Structure in Galaxies Marc S Seigar Department of Physics and Astronomy, University of Minnesota Duluth, USA Morgan & Claypool Publishers Copyright ª 2017 Morgan & Claypool Publishers All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the publisher, or as expressly permitted by law or under terms agreed with the appropriate rights organization. Multiple copying is permitted in accordance with the terms of licences issued by the Copyright Licensing Agency, the Copyright Clearance Centre and other reproduction rights organisations. Rights & Permissions To obtain permission to re-use copyrighted material from Morgan & Claypool Publishers, please contact [email protected]. ISBN 978-1-6817-4609-8 (ebook) ISBN 978-1-6817-4608-1 (print) ISBN 978-1-6817-4611-1 (mobi) DOI 10.1088/978-1-6817-4609-8 Version: 20170601 IOP Concise Physics ISSN 2053-2571 (online) ISSN 2054-7307 (print) A Morgan & Claypool publication as part of IOP Concise Physics Published by Morgan & Claypool Publishers, 40 Oak Drive, San Rafael, CA, 94903 USA IOP Publishing, Temple Circus, Temple Way, Bristol BS1 6HG, UK For my wife, Colleen, and my boys, David and Andrew Contents Preface ix Acknowledgements x Author biography xi 1 The discovery of spiral galaxies 1-1 Suggested further reading 1-6 2 The classification of galaxies 2-1 2.1 Elliptical galaxies