 |
|
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
| • HOME • ABOUT • CATEGORIES • COPYRIGHT • NEWSLETTER   
|
prime meridian
The meridian adopted as the zero of longitude measurement on the surface of a planet. In the case of Earth, the prime meridian adopted by international agreement in 1894 is that of the Airy Transit Circle at the Old Royal Greenwich Observatory.
Related category
• CELESTIAL MECHANICSAlso on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History