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EclipseGeeks.com - All you ever wanted to know about eclipses and other celstial bodies

The Prime Meridian is the line of 0° of longitude which divides the Earth into the Eastern and Western Hemispheres.

All world time zones are either set in front or behind the Prime Meridian at Greenwich, London, England.

 

Astronomical data, National Observatories, International Space Organisations and other Astronomical Services use Universal Time ‘UT’ when predicting astronomical  events. It avoids ambiguity and confusion across the World’s Time Zones. Everyone knows exactly when an event will occur. Use the map below to add or suntract your time zone from the Prime Meridian at Greenwich London, England.

 

Astronomical data, computers, computer servers, world wide web standards, network time protocols,  aircraft navigation, nautical positioning systems, GPS systems, satellites, weather forecasts, flight plans, air traffic control, and civilian time zones throughout the world all use a single reference time which is measured from the Prime Meridian at Greenwich London England. The Prime Meridian is the line of 0° of longitude which divides the Earth into the Eastern and Western Hemispheres. All world time zones are either set in front or behind the Prime Meridian at Greenwich.

 

Greenwich Meantime (GMT)  is also known as Universal Time UT and uses a 24 hour clock system with a new day beginning at midnight. Although UT and GMT exact definitions differ, for most everyday situations, one can assume that Universal Time is comparable to Greenwich Meantime (GMT). .  

 

Universal Time 'UT' also refers to a time scale called Coordinated Universal Time ‘UTC’ which is the basis for the worldwide system of civil time. This time scale is kept by National Physical Laboratories and Institutions around the world using high accurate caesium atomic clocks.

 

International Astronomical Data  and Astronomy Events are normally given in UT – Universal Time / GMT – Greenwich Meantime. Using a single reference time avoids ambiguity when describing when an astronomical event will occur; you can use this map to calculate your own time zone with reference to UT/GMT.  

Global World Time Map:

Courtesy of the University of Texas Libraries, The University of Texas, Austin, USA.  

Global-Map-World-Time-Zones-Eclipse-Geeks

Time Zones World Map

 

The Prime Meridian

 

The Prime Meridian is the line of 0° longitude which divides the Earth into the Eastern and Western Hemispheres.

 

All world time zones are either set in front or behind the Prime Meridian at Greenwich, London, England.

 

 

Greenwich Mean Time is the same as Universal Time (UT), a standard astronomical concept used in many technical fields.

 

UT – Universal Time / GMT – Greenwich Meantime

 

International Astronomical Data and Astronomical Events are normally given in: UT. Universal Time / GMT. Greenwich Meantime.

 

Using a single reference time avoids ambiguity when describing when an astronomical event will occur.

 

Please use this map to calculate your own time zone with reference to UT/GMT.   

Click World Time Zone Map to enlarge

Astronomical events are normally given in: UT/GMT.

Using a single reference time avoids ambiguity; you can use this world map see your own time.

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