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Gudrun Wolfschmidt ed. September 3. Hans Seeger September Tuesday 2.

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Gudrun Wolfschmidt ed. September 3. Hans Seeger September Tuesday 2. October 33 5. Contents 7 Saturday, September 9. Christine Kitzlinger Gudrun Wolfschmidt: Guided tour through Hamburg to places of interest in respect to history of astronomy The School of Navigation in Hamburg was founded in Hamburg Observatory had two predecessors, a private observatory in , and in an observatory initiated by Johann Georg Repsold , since State Institute.

In Heinrich Christian Schumacher founded another observatory in Altona, at that time under Danish administration. The new observatory was built in to at the outskirts of Hamburg in Bergedorf since University Observatory.

The year is for Hamburg Observatory the th jubilee. The buildings mirror the architecture of that time, and the impressive collection of instruments form an important historical record of astronomical and astrophysical research. A highlight in Hamburg's history was the invention of the Schmidt Telescope around The whole ensemble was put under monument protection in due to its signicance in cultural history. Ceragioli 11 1. Schroeter was celebrated the 19th century as the Herschel of Germany, not only for his epoch-making lunar and planetary observations, but also for the excellence of his large telescopes-rivaling those of William Herschel himselfmade at Schroeter's private observatory in Lilienthal, Germany, near the port city of Bremen.

Starting in , Schroeter carried on an extensive and detailed correspondence with William Herschel discussing telescopes, astronomical observing, and Schroeter's controversial ideas about the nature of the planets. These letters have been little-consulted by historians, probably because they are not easily accessible and not easily read, being hand-written in an obsolete script that is no longer widely understood, especially outside of Germany. The present talk discusses the author's complete transcription of the letters into modern type-face and his investigation of the content.

The letters feature many points of interest, not only for the study of Schroeter's own work, but also for the study of William Herschel, his social position in England, and his fraught relations with his German colleagues.

Astronomers went on both voyages, and were supplied with telescopes, quadrants, astronomical clocks, chronometers and other instruments, as well as pre-fabricated tent observatories.

In this paper we describe these portable observatories, and the ways in which they were used by the dierent astronomers during the various stop-overs made in New Zealand in , and With its traces of use and the conversions and additions made over time it is evidence of a long period of astronomic research.

The telescope oers an extremely rare value of authenticity that should have been preserved as it is almost in its original condition and "true" context. This lecture, given directly in front of the telescope, presents the concept of preservation for this device of technical heritage, and delivers insight into the conservation treatments, in addition to demonstrating the usual features of the technical components of the telescope. During the hunt, many other historic telescopes, observatories and astronomical treasures were discovered by the speaker, all along Eastern China.

From the Forbidden City and the Peking Ancient Observatory to Purple- Rose Mountain Observatory complex, China has managed to preserve many of its observatories and instruments and has been working hard to make them accessible to the public. With one of his early telescopes he made detailed topographical observations of the moon surface, that he published in his famous Selenographia He used helioscopes for the study of the sun, grinded his own lenses with a self constructed grinding machine and developed a periscope, which he called polemoscope, as it was intended for military use.

Beside this he pursued building new telescopes, each one with a bigger focal length than its predecessor to minimize the eects of spherical aberration. This trend concluded in a ft long telescope, for which the lenses were made by Titus Livius Burattinus One of these lenses is believed to be at the Deutsche Museum in Munich. The rest of his instruments became victims of a conagration in or got lost.

In my paper I will give a short overview of the optical devices of Hevelius with an emphasis on his giant telescopes. How were they constructed? Where were they erected? In which way were they moved to follow the apparent motion of the stars?

And nally where is the place of Hevelius' telescopes in the historical context? Angular measurements were at the heart of astronomical observation even after the advent of the telescope, and until the rise of astrophysics in the last third of the 19th century.

The telescopic observations of Galileo were of course very important, giving signicant support to the heliocentric system of Copernicus, but they did not clinch the matter. An ultimately more important development, a few years later, was Kepler's showing that the motions of the planets could be much better represented by elliptical orbits around the Sun. And Kepler was able to make his discovery because of the unprecedented accuracy of the angles measured without telescopes a few years earlier by Tycho Brahe around one minute of arc.

How were these measurements possible? Simply because Tycho Brahe had invented a new sighting device that was fundamentally dierent from the open slits or plain sights that had been used since antiquity. It was actually extremely simple, but was never really understood even by the few astronomers who used it. It was much more accurate than previous sights, but the Keplerian telescope with crosshairs was even better, and by the end of the 17th century the controversy surrounding the impossible accuracy of Tycho's observations had been largely forgotten.

Their activity has centered on a comprehensive eort to identify, image, and scan all surviving documents and artifacts related to Schmidt; and to begin a systematic interpretation of them in order to develop an organic picture of how Schmidt's work in telescope optics led to his revolutionary concept of the Fast Coma-Free Mirror System lichtstarkes komafreies Spiegelsystem , or Schmidt camera, in They have also discovered several important new artifacts.

The present talk will outline their work and its possible future directions. Normally, these groups are separated and only a few people are interested in both subjects. The astronomer can nd a lot of historic literature but it is nearly impossible to nd something on binoculars, because until the s to the s, no monograph on prismatic binoculars, their principles, forms and features had been published.

In the works of Moritz von Rohr, a lot of information was collected and published, but it was possibly Joachim Rienitz who was the rst to wrote a useful text: Die Kulturgeschichte des Fernrohrs, a monograph with several topics but mainly dedicated to opera glasses. It was the high quality of military optics by Zeiss which changed critical users of binoculars into collectors, who tried to nd the best of the best in handheld binoculars.

They taught each other and an informal body of knowledge was formed in this way but nobody wrote a textbook on binoculars in general or on these military binoculars. The reason is that binoculars were not, in contrast to astronomical telescopes, regarded as high-tech instruments.

Said in another way: He, who has the theoretical knowledge, doesn't write on binoculars, and the collector with a lot of experience and knowledge on binoculars, doesn't write books. Meetings on the subject of historic binoculars were organized in several countries. The internet allowed cooperation and sharing of information, but nobody wrote a monograph on Zeiss binoculars, strangely enough because Zeiss was and is the leading company in optics. After the reunication of Germany a good cooperation with the two Jena institutions, the Zeiss archive and the Optical Museum was established.

After this, he extended the short Zeiss chapter of his rst book to a monograph on Zeiss binoculars from. Modelle Merkmale Mythos. This book will be shown as well as other binocular books on the market today.

This is, as the title says, the present state: what has been done. The next step is the second volume of the monograph, describing the Zeiss models up to This volume is in the pipeline and the author welcomes all forms of cooperation. He suggested this new type, because he wanted to correct the projection errors of both types of optical projection and he wanted to make refracting telescopes, which are bigger than mm in diameter.

He really managed to develop such a system theoretically. Due to the complexity of the Schupmann system, only few telescopes of this type had been built. Additionally, Europe saw World War I which delayed further developments and soon afterwards, in , Schupmann died while his second paper was in the proof-reading phase. So, it appeared with some grave errors and it was a great challenge for astro-engineers to really perform this type of telescope.

Nonetheless, the young Edwin Rolf became interested in that topic. Since he was hobby astronomer, he made his own telescope of this type in the s. After moving to Rathenow, close to Berlin, during the Second World War and opening again his own work-shop in this city of optical industry, he was surrounded with people who helped him performing a really great project.

He wanted to build a medial telescope, which due to Schupmann should be bigger than mm in diameter. As far as we know, he started with that work soon after the war was over. In , the astronomy class of the German Academy of Science was founded and under the rst projects was a nancial support for Rolf's project ex post facto. So, he nished his Giant Medial in , tested the instrument during the following years in comparison with another big telescope-set he built and gave a nal report in His telescope has a diameter from the front lens of mm, focal length of Additionally, Rolf's telescope provides a lot of special features, which are witnesses of tremendously large interest and accuracy of Rolf's work.

Watching all reports and protocols of the Academy of Science I found out, that the astronomers never got back to his results. They only discussed one time, that there are some giant telescopes at Rathenow, but did not decide anything, what to do them.

So, Edwin Rolf used them personally by oering guided tours through his work-shop and so called public observatory. After Rolf's death in the declined telescope in his garden has been sold twice, demounted in the garden , remounted at a school's yard and again moved from there to a public park.

Hoffmann 21 in The park is called park of optics and provides a lot of optical toys as outdoor activities. My talk will give an overview over the technical details of Schupmann's dream and its technical performance by Edwin Rolf. I will also show some sequences of the original movie of Edwin Rolf on his public observatory Rathenow, which is an amateur lm I dated historically in the early s. At Hamburg Observatory in Bergedorf more than Most of these plates had been stored but not cataloged electronically so that they had been more or less unusable for further research most of their lifetime.

The primary goals of the project are i to make the information available to research again, ii to preserve this valuable historic archive for the future, especially before further plate deterioration, and iii to present all available information together with the plate images in the world wide web including the access from virtual observatories. The rst plates are already scanned and can be accessed by public. Each plate has its own web page comprising information from envelope, log book and observers notes.

The archives may not only be useful for researchers but also for historians, amateur astronomers and the interested public. In this paper we discuss Marriott's training as a scientic instrument-maker in England and the extent to which he put these skills into practice while living in New Zealand. We end by describing a marine telescope made by Marriott in which is now owned by the rst author of this paper.

The Marseille Observatory was founded by and directed for 60 years by the Jesuits, and nanced by the French Navy. The original building which still exists was located near the Old Port.

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Started by Jason , 2 Nov Posted 2 Nov I see lots of stations are plotted along the edge of two zones. Am I correct in thinking that I could have either zone or on my travel card to travel to Ohlsdorf for eg? Have a look which zone or is more convenient for you maybe you travel through a certain zone on the way to work etc.

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