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Description: | Both Halley's and Bradley's 8-foot (244 cm) mural quadrants are mounted on a wall of nine massive stone blocks set into the bedrock of Greenwich Hill. Halley, who had made a name for himself studying the less well known stars of the southern celestial hemisphere, originally set his quadrant on the east side of the wall, roughly in line with Flamsteed's first Greenwich meridian and facing south.
The design of Halley's quadrant provides a simple, strong and accurate instrument. Above the wall, the visitor can see remnants of the two viewing slots that were opened in the roof.
A fragment is marked AST0970.1 and can be found via the Whole/Part toggle. Tube in KB1288 11D \&\ 12C, fragment in WW272 13B. negative number B2343
caption: Mural quadrant (AST0970), George Graham. Royal Observatory (ROG) December 2009
caption: Halley's 8 foot iron mural quadrant and wall, 1725 in the Meridian Building | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | Refracting telescope Quadrant Graham mural quadrants Halley The Old Royal Observatory Greenwich Observatory Telescopes Edmond George | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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Fragment
Fragment of Halley's mural quadrant…
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