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    Arago medallion near the Louvre pyramid. In his "Hommage à Arago," commissioned as a memorial to François Arago (1786-1853), Jan Dibbets set over a hundred of these bronze medallions into the ground along the Paris Meridian from the southern to the northern boundaries of the City. Each of them is 12 cm in diameter, with Arago's name and showing north and south. (Photo credit: Poulpy) Mona Evans, "Full Meridian of Glory - book review" www.bellaonline.c...

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    • Mona Evans

      Arago medallion near the Louvre pyramid. In his "Hommage à Arago," commissioned as a memorial to François Arago (1786-1853), Jan Dibbets set over a hundred of these bronze medallions into the ground along the Paris Meridian from the southern to the northern boundaries of the City. Each of them is 12 cm in diameter, with Arago's name and showing north and south. (Photo credit: Poulpy) Mona Evans, "Full Meridian of Glory - book review" http://www.bellaonline.com/articles/art181703.asp

    • T. Klaassen

      Jan Dibbets, Arago medallion Paris

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    Hommage à Arago? Jan Dibbets made 135 bronze medallions to lay in various places along the Paris Meridian as a memoral to François Arago (1786-1853), (Credit: océane lesgourgues) But WHY is Arago's name misspelled here? Mona Evans, "Full Meridian of Glory - book review" www.bellaonline.c...

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    Sundial, church of Saint-Sulpice, Paris. The obelisk and brass line on the floor form a sundial. The line is a meridian - a line oriented north-south. The obelisk casts a shadow on it. It dates from the early 17th century and its purpose was to allow accurate solar observations to determine the date of Easter. Mona Evans, "Full Meridian of Glory - book review" www.bellaonline.c...

    Paris Observatory, beginning of the 18th century. (Engraving: C. Wolf) Marly Tower is on the right. Giovanni Domenico Cassini had it moved to the grounds of the observatory in order to mount aerial telescopes and long tubed telescopes. Mona Evans, "Full Meridian of Glory - book review" www.bellaonline.c...

    Prime Meridian Marker, Greenwich. This was the meridian established by Astronomer Royal George Airy. It was the one in use when the Greenwich meridian was adopted as the prime meridian of the world by the International Meridian Conference in Washington, DC in 1884. (Photo: Ryan Berlin) ©Mona Evans, “Royal Observatory Greenwich" www.bellaonline.c...

    Kew Meridian line. This is the meridian used for adjusting the instruments in the King's Observatory. The marker is on the Thames towpath between Richmond and Kew. (Photo: Ian Ridpath) ©Mona Evans, “Kew Observatory” www.bellaonline.c...

    Uraniborg, which means castle of the heavens. In the 16th century the Danish king made the land available to Tycho Brahe. Tycho built an observatory, a palace, a laboratory and a research institute. Scholars came from around Europe to research in astronomy and a number of other disciplines. Tycho himself was interested in alchemy and medicines, so Uraniborg included laboratories. ©Mona Evans, "Tycho Brahe" www.bellaonline.c...

    Apollo 10 Command Module, Science Museum, South Kensington, London. (Image: Science Museum) ©Mona Evans, “Space at the Science Museum London” www.bellaonline.c...

    Orrery, on display in the Science Museum, South Kensington, London. Made by John Rowley in 1712-13 for the Earl of Orrery. It shows the movement of the Earth and Moon around the Sun. Also known as a tellurium. (Credit: Science Museum) ©Mona Evans, “Space at the Science Museum London” www.bellaonline.c...

    Original mirror for William Herschel's 40-foot telescope. (Credit: Science Museum, London) Drawing of the telescope. (WikiCommons, artist unknown) ©Mona Evans, “Space at the Science Museum London” www.bellaonline.c...

    Drawing of the Moon July 26, 1609, by Thomas Harriot. The first documented viewing of a heavenly body seen through a telescope. Observed in Syon Park, Isleworth, England. ©Mona Evans, “Syon House” www.bellaonline.c...