![](http://www.alamy.com/thumbs/6/3EA2D069-DBFA-4CCA-9DBC-AC3E6C372229/AYB225.jpg)
The Telescope at Royal Greenwich Observatory on the line of 0 Degreees longitude
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Photo credit: © Travelshots / Alamy / Afripics
License: Licensed
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Keywords: 240938, astronomy, dome, england, greenwich, latitude, london, longitude, meridian, navigate, navigation, observatory, refractory, royal, telescope