Meridian Line


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Meridian Line

 

the straight line along which the celestial meridian plane intersects the plane of the celestial horizon. The meridian line intersects the celestial sphere at the north and south points. The line in the horizontal plane perpendicular to the meridian line determines the east and west points on the celestial sphere. The sun reaches its greatest height above the horizon almost exactly at apparent noon, at. which point the center of its disk intersects the meridian, although the greatest height may be reached somewhat earlier or later than noon owing to variations in the declination of the sun. At this time, shadows cast by objects on the earth point along the meridian line and are at their shortest. This makes it possible to determine approximately the moment at which noon begins and the cardinal points—north, south, east, and west.

References in periodicals archive ?
as well as design and manual pupils' activities (as the construction of a "camera obscura" to observe the sun and the pinhole characteristics, the drawing of the meridian line, the search for disappeared meridians and/or the "adoption" of an existing one).
One can perceive of this meridian line and parallel line as the axes of moments crossing the state.
uk) to make links between the eight countries on the meridian line.
Arguing that the Date Line is not legal, he claims the 180-degree Meridian Line is the "real" decider.
The site is next door to the Greenwich Royal Observatory, home to Greenwich Mean Time and on the zero meridian line.
The heavy morning rain had made conditions very testing and Mullen made the most of his wide draw aboard the youngster as he came stands' side before beating Meridian Line by a length and a quarter.
This will make it a special night for anyone planning a party along the meridian line.
MarineMax will carry the Meridian line in all markets east of the Rockies.
With more than 20 years experience in the travel industry, Meridian Line Travel has launched a new website featuring charter flight availability departing from 25 airports in the UK, including Birmingham.
It is left-handed, a mile round, and offers good viewing for those who can scale the Downs - and there should be no excuses for inaccuracies in times or distances, since the winning post is on the Meridian line.
He said: "The eyes of the world will be on Britain, on the meridian line at Greenwich, on the opening of the Dome.
The vast pounds 758 million Millennium Dome on the Meridian Line running through South East London is supposed to attract 30,000 paying visitors a day.