Australia Total Solar Eclipse November 2012
Important note concerning the date of the solar eclipse
How to make sure that you turn up on the correct day
WHY are two different dates shown on some websites and news articles - the 13th and 14th - what is going on?
The November 2012 Total Solar Eclipse path traverses several time zones and astronomers need to co-ordinate data using a single reference time.
Australia Local Time
The Total Solar Eclipse occurs locally over north east Australia on Wednesday morning 14 November 2012.
UTC - Coordinated Universal Time and GMT - Greenwich Meantime
Astronmers use a co-ordinated single reference time of UTC - Coordinated Universal Time; GMT - Greenwich Meantime.
Using astronomical time theTotal Eclipse Phase Begins 13 November 20:37:03.0, but as Australia is several time zones ahead of GMT, observers from locations within the path of the eclipse have to add their own time difference to that of Greenwich Meantime.
UTC and GMT are for all general purposes the same thing. UTC is sometimes referred to as UT - Universal Time. Unless describing a high accracy of time, all three, UTC, GMT and UT are interchangable.
UTC / UT / GMT Iinternational Time Scale
UTC / UT / GMT is an international time scale used for astronomical and other products to record and predict events. This ensures that the time of an event is universally understood. It avoids ambiguity or confusion. It also avoids confusion about time zones and daylight saving time.
UTC is also the time standard used in aviation, weather forecasts, flight plans, air traffic control clearances and maps,
Total Solar Eclipse - UTC / GMT - 13 November 2012
Using astronomical time the Total Eclipse Phase Begins 13 November 20:37:03.0
The Prime Meridian Greenwich, London England
Astronomical data, computers 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.