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539:. He published several papers on the subject based on observations made at Stonyhurst. In work carried out between 1881 and 1898, he came to the conclusion that although magnetic storms were not directly a result of sunspots, they were due to clouds of electrified particles moving between the Sun and Earth. It is now known that solar mass ejections caused by solar flares can interact with the Earth's magnetic field to produce magnetic storms. They are now of great importance, having been known to disrupt national power-grids and cause expensive damage to Earth-orbiting telecommunication satellites.
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The 'Stonyhurst System of heliographic coordinates' is one of two 'heliographic coordinate' systems used for identifying the position of features on the Sun's surface. In the
Stonyhurst system the zero point is set at the intersection of the Sun's equator and central meridian as seen from the Earth.
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through the year and is called B0. Earth crosses the Sun's equator about
December 7 and June 7 each year. This means that the lines of latitude on the sun do not appear as lines from the Earth, but as elliptical arcs. Sunspots and other features will rotate across the face of the Sun along lines of
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latitude. Stonyhurst disks are transparent overlays that match the size of whole-disk images of the Sun. These disks provide a graphic means of locating sunspots on the solar disk in reference to lines of latitude and longitude. Different disk overlays are produced for different dates.
501:. In solar physics he made a long photographic study of the Sun, including hundreds of photographs taken in the violet light of calcium, using a Hilger spectroscope acquired by Father Perry. In this research he showed that the Sun is spectroscopically, a variable star.
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A 'Stonyhurst disk' is used to determine the longitude and latitude of sunspots. The Earth doesn't orbit precisely around the Sun's equator, so through the year the center of solar pictures moves up and down a little more than 7 degrees. This angle varies
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The records of temperature, which continue to be taken there, began in 1846 and are among the oldest continuous daily records in the world (the very oldest continuous daily temperature records have been taken at the
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Longitude increases towards the Sun's western limb. A solar feature will have a fixed latitude as it rotates across the solar disk, but its longitude will increase. This is in contrast to the
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its telescope, parts of which dated to the 1860s, was sold. When its private owner came to re-sell it, the
College was able to buy it back and restore it to its original home.
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The observatory is currently run by
Classics master Fintan O'Reilly, who also teaches GCSE astronomy. Occasionally access is permitted to the observatory for visitors.
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to provide central
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and
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During the course of the twentieth century, the observatory fell out of use for astronomical purposes and after the
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Sidgreaves also carried out original research into the solar spectrum, contained in many papers published in the
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During his time as president of the Branch, Sidgreaves carried out original work into the spectroscopy of
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astronomical leanings, particularly in solar observation, apparently stemmed from his time in residence.
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in 1854, it became one of seven key UK stations. The observatory was managed and operated by the
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in 1838, and intended primarily to serve as a meteorological station. With the foundation of the
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since 1756). In 2004, Stonyhurst replaced
Ringway as one of four weather stations used by the
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Sidgreaves was particularly interested in the connection between
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Article on
Stonyhurst's telescope 2002. Retrieved 18 July 2008
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BBC Two - Earth: The
Climate Wars, Fightback, Dr Iain Stewart.
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In 1848, the year in which
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BBC Two programme featuring the Stonyhurst Observatory
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The 1838 observatory amid the gardens at Stonyhurst
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823:Article on 1927 eclipse at Stonyhurst
848:Tourist attractions in Ribble Valley
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163:Location in the United Kingdom
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818:1927 eclipse at Stonyhurst 2
813:1927 eclipse at Stonyhurst 1
131:https://www.stonyhurst.ac.uk
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659:Retrieved 20 September 2008
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788:Article on the observatory
783:Stonyhurst College website
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546:, the Italian astronomer,
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114:Average temperature: 8.4°C
720:A Dictionary of Astronomy
492:General Sir Edward Sabine
447:See: Stonyhurst Refractor
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196:Location in Lancashire
190:Stonyhurst Observatory
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618:Retrieved 21 Oct 2009
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808:Stonyhurst Refractor
548:Father Angelo Secchi
535:and fluctuations in
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761:Muir, T.E. (2006)
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39:Organization
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627:T.E. Muir,
520:, in 1901.
367:Observatory
357:Collections
352:School life
327:Antecedents
119:Established
90: /
65:Coordinates
18:Observatory
837:Categories
763:Stonyhurst
669:Met Office
629:Stonyhurst
603:References
558:in Italy.
552:Stonyhurst
436:Met Office
268:Lancashire
57:Lancashire
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681:Telescope
372:Alumni/ae
347:Charities
742:Archived
703:Archived
684:Archived
639:pp.145-7
533:sunspots
293:a series
291:Part of
103:Altitude
49:Location
739:nso.edu
577:College
544:College
455:History
332:History
127:Website
111:Weather
75:53°48′N
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377:S.M.H.
337:Estate
319:Topics
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254:The
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