Newcomb's tables formed the basis of all astronomical ephemerides of the Sun from 1900 through 1983: they were originally expressed ( and published ) in terms of Greenwich Mean Time and the mean solar day, but later, in respect of the period 1960 – 1983, they were treated as expressed in terms of ET, in accordance with the adopted ET proposal of 1948 – 52.

In the introduction to Newcomb's Tables of the Sun ( 1895 ) the basis of the tables ( p. 9 ) includes a formula for the Sun's mean longitude, at a time indicated by interval T ( in Julian centuries of 36525 mean solar days ) reckoned from Greenwich Mean Noon on 0 January 1900:

# REDIRECT Greenwich Mean Time

Greenwich Mean Time ( GMT ) is a time system originally referring to mean solar time at the Royal Observatory in Greenwich, London, which later became adopted as a global time standard.

It is arguably the same as Coordinated Universal Time ( UTC ) and when this is viewed as a time zone the name Greenwich Mean Time is especially used by bodies connected with the United Kingdom, such as the BBC World Service, the Royal Navy, the Met Office and others particularly in Arab countries, such as the Middle East Broadcasting Center and OSN.

Before the introduction of UTC on 1 January 1972 Greenwich Mean Time ( also known as Zulu time ) was the same as Universal Time ( UT ) which is a standard astronomical concept used in many technical fields.

Astronomers no longer use the term " Greenwich Mean Time ".

Noon Greenwich Mean Time is rarely the exact moment when the sun crosses the Greenwich meridian ( and reaches its highest point in the sky at Greenwich ) because of Earth's uneven speed in its elliptic orbit and its axial tilt.

The fictitious mean sun is the annual average of this nonuniform motion of the true Sun, necessitating the inclusion of mean in Greenwich Mean Time.

Ireland adopted Greenwich Mean Time in 1916, supplanting Dublin Mean Time.

The term Greenwich Mean Astronomical Time ( GMAT ) was introduced to unambiguously refer to the previous noon-based astronomical convention for GMT.

Several countries throughout the world legislatively define their local time by explicit reference to Greenwich Mean Time.

Polar expeditions may use any time zone that is convenient, such as Greenwich Mean Time, or the time zone of the country they departed from.

The Julian Day Number ( JDN ) is the integer assigned to a whole solar day in the Julian day count starting from noon Greenwich Mean Time, with Julian day number 0 assigned to the day starting at noon on January 1, 4713 BC proleptic Julian calendar.

Externally, it appears as a large white marquee with twelve 100 m-high yellow support towers, one for each month of the year, or each hour of the clock face, representing the role played by Greenwich Mean Time.

The local standard time ( adjusting for any daylight saving time or war time ) is then converted into Greenwich Mean Time or Universal Time at that same instant.

Greenwich Mean Time ( GMT ) was originally mean time deduced from meridian observations made at the Royal Greenwich Observatory ( RGO ).

Greenwich Mean Time is still the legal time in the UK ( in winter, and as adjusted by one hour for summer time ).

( See articles Greenwich Mean Time, Universal Time, Coordinated Universal Time and the sources they cite.

) Physically, the meridian of Greenwich in Universal Time is almost always to the east of the meridian in Terrestrial Time, both in the past and in the future.

* 1924 – The Royal Greenwich Observatory begins broadcasting the hourly time signals known as the Greenwich Time Signal or the " BBC pips ".

Universal Time ( UT ), a term introduced in 1928, initially represented mean time at Greenwich determined in the traditional way to accord with the originally-defined universal day ; then from 1 January 1956 ( as decided by the IAU at Dublin, 1955, at the initiative of William Markowitz ) this " raw " form of UT was re-labeled UT0 and effectively superseded by refined forms UT1 ( UT0 equalized for the effects of polar wandering ) and UT2 ( UT1 further equalized for annual seasonal variations in earth rotation rate ).

* Greenwich Time ( Greenwich, Connecticut )

The `` fruitful course '' of metropolitanization that you recommend is currently practiced by the town of East Greenwich and had its inception long before we learned what it was called.

East Greenwich was one of the first Rhode Island towns to enter into contract agreement with the Rhode Island Development Council for planning services we could not provide for ourselves.

She patronized Greenwich Village artists for awhile, then put some money into a Broadway show which was successful ( terrible, but successful ).

At 17:07 that afternoon ( Greenwich time ) the shock was recorded by the seismograph alarm in Honolulu.

While accounts of the progress of the tsunami came in from various points in the Pacific ( Midway reported it was covered with nine feet of water ), the Hawaiian station made its calculations and notified the military services and the police that the first big wave would arrive at Honolulu at 23:30 Greenwich time.

From that time until 1972 the Astronomer Royal was Director of the Royal Observatory Greenwich.

Ælfheah refused to allow a ransom to be paid for his freedom, and as a result was killed on 19 April 1012 at Greenwich ( then in Kent, now part of London ), reputedly on the site of St Alfege's Church.

Phillip was educated at the Greenwich Hospital School, part of Greenwich Hospital, and at the age of 13 was apprenticed to the merchant navy.

Another early reference reports that " base ball " was regularly played on Saturdays in 1823 on the outskirts of New York City in an area that today is Greenwich Village.

" By 1928, Fuller was living in Greenwich Village and spending much of his time at the popular café Romany Marie's, where he had spent an evening in conversation with Marie and Eugene O ' Neill several years earlier.

The film, which was co-directed with Leach and producer Cynthia Munroe, had been shot in 1963 but remained unreleased until 1969, when De Palma's star had risen sufficiently within the Greenwich Village filmmaking scene.

In the late 1940s and early 1950s, the crest of the former metropolitan borough of Greenwich was used as a symbol for the club but this was not used on the team's shirts.

The last example of these still in reasonable condition was Cutty Sark, preserved in dry dock at Greenwich, United Kingdom.

The growth brought to Docklands enabled the Jubilee Line to be extended in 1999 to east London by a more southerly route than originally proposed, through Surrey Quays, Canary Wharf and the Greenwich Peninsula ( which was the next regeneration area ) to Stratford.

His cabin at Greenwich was full of photographs of actresses, some of which were signed in the most endearing terms.

A sister title, The Peninsula, was launched in 2007, covering the Greenwich Peninsula.

Elizabeth was born at Greenwich Palace and was named after both her grandmothers, Elizabeth of York and Elizabeth Howard.

Oxford openly quarrelled with Leicester about this time ; he was confined to his chamber at Greenwich for some time ' about the libelling between him and my Lord of Leicester '.

The film was shot mainly in London and the Home Counties, including Hampstead, Greenwich Hospital, Betchworth in Surrey, Amersham in Buckinghamshire, St Bartholomew-the-Great ( wedding # 4 ) and West Thurrock in Essex.

LaGuardia was born in Greenwich Village in New York City to two Italian immigrant parents.