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www.rmg.co.uk
| | www.sea.museum
2.7 parsecs away

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| | [AI summary] A blog post explains why determining longitude at sea was historically much more difficult than finding latitude, highlighting the role of John Harrison's clocks and celestial navigation.
| | www.guidelondon.org.uk
3.0 parsecs away

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| | Find out about the John Harrison H4, the world's most important clock which can be viewed at the Greenwich Royal Observatory museum.
| | enfilade18thc.com
1.7 parsecs away

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| | 1 post published by Editor on January 8, 2025
| | 77wolfhowls.wordpress.com
10.5 parsecs away

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| Metal Detectors In Movie Theaters.