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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Royal Borough of Greenwich in Greater London County, England, United Kingdom
 

Airy’s meridian line

 
 
Airy’s meridian line Marker image. Click for full size.
By Michael Herrick, April 28, 2018
1. Airy’s meridian line Marker
Inscription.
George Biddell Airy, seventh Astronomer Royal, commissioned the enormous telescope that still defines the Prime Meridian and is situated in the building ahead of you. Observations made here were used by cartographers, surveyors, navigators and astronomers. By 1884 most ships were using charts based on this meridian line. Since that year it has been the baseline for world time.

You are now standing on the Prime Meridian of the world, as defined by Airy's telescope and agreed by international convention in 1884.

Astronomers worked in pairs on the Airy Transit Circle: one looked through the eyepiece while the other observed the microscope readings on the stone pier.

 
Location. 51° 28.674′ N, 0° 0.089′ W. Marker is in Royal Borough of Greenwich, England, in Greater London County. Marker can be reached from the intersection of Blackheath Avenue and Great Cross Avenue, on the left when traveling north. Touch for map. Located at the Royal Observatory Greenwich. Marker is in this post office area: Royal Borough of Greenwich, England SE10 8XJ, United Kingdom.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Time for everyone (here, next to this marker); The Greenwich Meridian Telescope (here, next to this
Airy’s meridian line Marker image. Click for full size.
By Michael Herrick, April 28, 2018
2. Airy’s meridian line Marker
The marker is to the right of the Prime Meridian, in the Western Hemisphere
marker); Bradley’s meridian line (here, next to this marker); The Shepherd 24-hour Gate Clock (a few steps from this marker); Ordnance Survey Bench Mark (a few steps from this marker); William Herschel’s Telescope (a few steps from this marker); Greenwich Meridian Marker, 1750-1851 (a few steps from this marker); Flamsteed’s Well Telescope (a few steps from this marker). Touch for a list and map of all markers in Royal Borough of Greenwich.
 
Also see . . .
1. Royal Observatory, Greenwich on Wikipedia. (Submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut.)
2. George Biddell Airy on Wikipedia. (Submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut.)
 
Categories. Science & Medicine
 
 
Credits. This page was last revised on May 24, 2018. This page originally submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut. This page has been viewed 53 times since then. Photos:   1, 2. submitted on May 24, 2018, by Michael Herrick of Southbury, Connecticut.
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