Finding True North - Revision history

DT Online at 09:17, 1 March 2017

2017-03-01T09:17:03Z

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	[[File:FindingNorth.png\|500px\|right\|link=~~https~~://en.wikipedia.org/wiki/True_north]]		[[File:FindingNorth.png\|500px\|right\|link=http://en.wikipedia.org/wiki/True_north]]
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	=====Introduction=====		=====Introduction=====

	[~~https~~://en.wikipedia.org/wiki/True_north '''True North'''] is where the Earth's rotational axis is imagined to emerge in the Northern hemisphere. By contrast, the North which a compass points to is the [~~https~~://en.wikipedia.org/wiki/Magnetic_declination '''Magnetic North'''] and this is currently some 5<sup><small>0</small></sup> different.		[http://en.wikipedia.org/wiki/True_north '''True North'''] is where the Earth's rotational axis is imagined to emerge in the Northern hemisphere. By contrast, the North which a compass points to is the [http://en.wikipedia.org/wiki/Magnetic_declination '''Magnetic North'''] and this is currently some 5<sup><small>0</small></sup> different.


	'''True North''' can be established with reference to either the Stars or the Sun. '''[[:Category:Ancient Egypt\|Ancient Egyptians]]''' used an instrument called a '''[[Ancient Egyptian Survey Tools\|Merkhet]]''' to take sightings of certain stars which appear to rotate around the North Pole and today we may refer to [~~https~~://en.wikipedia.org/wiki/Polaris '''Polaris'''] as the '''North Star''' or the '''Pole Star''' ''(although at the time of the Ancient Egyptions, ‘Polaris’ would not have been in this position)''.		'''True North''' can be established with reference to either the Stars or the Sun. '''[[:Category:Ancient Egypt\|Ancient Egyptians]]''' used an instrument called a '''[[Ancient Egyptian Survey Tools\|Merkhet]]''' to take sightings of certain stars which appear to rotate around the North Pole and today we may refer to [http://en.wikipedia.org/wiki/Polaris '''Polaris'''] as the '''North Star''' or the '''Pole Star''' ''(although at the time of the Ancient Egyptions, ‘Polaris’ would not have been in this position)''.

DT Online at 13:12, 30 October 2016

2016-10-30T13:12:33Z

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	Careful note is then made of where the '''end of the shadow''' ''(or the head of the nail)'' crosses a particular circle both in the morning then again in the afternoon. A line joining the two points marked creates an East-West axis and its '''[[Basic Constructions\|~~Perpedicular~~ Bisector]]''' ''(or '''[[Basic Constructions\|Bisector of the Angle]]''' created by the two shadows)'' provides the North-South axis.		Careful note is then made of where the '''end of the shadow''' ''(or the head of the nail)'' crosses a particular circle both in the morning then again in the afternoon. A line joining the two points marked creates an East-West axis and its '''[[Basic Constructions\|Perpendicular Bisector]]''' ''(or '''[[Basic Constructions\|Bisector of the Angle]]''' created by the two shadows)'' provides the North-South axis.

DT Online: Added Category

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	{{Sundials Buyers Guide}}		{{Sundials Buyers Guide}}

			[[Category:Topics]]
			[[Category:Ancient Egypt]]
	[[Category:Terminology]]		[[Category:Terminology]]
	[[Category:Tasks]]		[[Category:Tasks]]

DT Online: DT Online moved page True North to Finding True North without leaving a redirect: Author request

2016-10-12T15:06:07Z

DT Online moved page True North to Finding True North without leaving a redirect: Author request

← Older revision	Revision as of 15:06, 12 October 2016
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DT Online: Added Template

2016-10-12T15:05:44Z

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	[[File:FindingNorth.png\|500px\|right\|link=https://en.wikipedia.org/wiki/True_north]]		[[File:FindingNorth.png\|500px\|right\|link=https://en.wikipedia.org/wiki/True_north]]
			__TOC__


			=====Introduction=====

	[https://en.wikipedia.org/wiki/True_north '''True North'''] is where the Earth's rotational axis is imagined to emerge in the Northern hemisphere. By contrast, the North which a compass points to is the [https://en.wikipedia.org/wiki/Magnetic_declination '''Magnetic North'''] and this is currently some 5<sup><small>0</small></sup> different.		[https://en.wikipedia.org/wiki/True_north '''True North'''] is where the Earth's rotational axis is imagined to emerge in the Northern hemisphere. By contrast, the North which a compass points to is the [https://en.wikipedia.org/wiki/Magnetic_declination '''Magnetic North'''] and this is currently some 5<sup><small>0</small></sup> different.
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	'''True North''' can be established with reference to either the Stars or the Sun. '''[[:Category:Ancient Egypt\|Ancient Egyptians]]''' used an instrument called a '''[[Ancient Egyptian Survey Tools\|Merkhet]]''' to take sightings of certain stars which appear to rotate around the North Pole and today we may refer to [https://en.wikipedia.org/wiki/Polaris '''Polaris'''] as the '''North Star''' or the '''Pole Star''' ''(although at the time of the Ancient Egyptions, ‘Polaris’ would not have been in this position)''.		'''True North''' can be established with reference to either the Stars or the Sun. '''[[:Category:Ancient Egypt\|Ancient Egyptians]]''' used an instrument called a '''[[Ancient Egyptian Survey Tools\|Merkhet]]''' to take sightings of certain stars which appear to rotate around the North Pole and today we may refer to [https://en.wikipedia.org/wiki/Polaris '''Polaris'''] as the '''North Star''' or the '''Pole Star''' ''(although at the time of the Ancient Egyptions, ‘Polaris’ would not have been in this position)''.


			=====Activity=====

	The Sun can be used to find '''True North''' quite simply by placing a vertical stake in the ground and noting which direction the longest shadow points to. More accurately, such a stake can be used to centre a number of concentric circles ''(or a sheet of paper with concentric circles drawn on it can be attached to a board and a large nail driven into the centre)''.		The Sun can be used to find '''True North''' quite simply by placing a vertical stake in the ground and noting which direction the longest shadow points to. More accurately, such a stake can be used to centre a number of concentric circles ''(or a sheet of paper with concentric circles drawn on it can be attached to a board and a large nail driven into the centre)''.
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	Careful note is then made of where the '''end of the shadow''' ''(or the head of the nail)'' crosses a particular circle both in the morning then again in the afternoon. A line joining the two points marked creates an East-West axis and its '''[[Basic Constructions\|Perpedicular Bisector]]''' ''(or '''[[Basic Constructions\|Bisector of the Angle]]''' created by the two shadows)'' provides the North-South axis.		Careful note is then made of where the '''end of the shadow''' ''(or the head of the nail)'' crosses a particular circle both in the morning then again in the afternoon. A line joining the two points marked creates an East-West axis and its '''[[Basic Constructions\|Perpedicular Bisector]]''' ''(or '''[[Basic Constructions\|Bisector of the Angle]]''' created by the two shadows)'' provides the North-South axis.


			{{Sundials Buyers Guide}}

	[[Category:Terminology]]		[[Category:Terminology]]
	[[Category:Tasks]]		[[Category:Tasks]]

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	[[Category:Terminology]]		[[Category:Terminology]]
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DT Online: Created article

2016-10-12T13:39:22Z

Created article

New page

[[File:FindingNorth.png|500px|right|link=https://en.wikipedia.org/wiki/True_north]]

[https://en.wikipedia.org/wiki/True_north '''True North'''] is where the Earth's rotational axis is imagined to emerge in the Northern hemisphere. By contrast, the North which a compass points to is the [https://en.wikipedia.org/wiki/Magnetic_declination '''Magnetic North'''] and this is currently some 5<sup><small>0</small></sup> different.

'''True North''' can be established with reference to either the Stars or the Sun. '''[[:Category:Ancient Egypt|Ancient Egyptians]]''' used an instrument called a '''[[Ancient Egyptian Survey Tools|Merkhet]]''' to take sightings of certain stars which appear to rotate around the North Pole and today we may refer to [https://en.wikipedia.org/wiki/Polaris '''Polaris'''] as the '''North Star''' or the '''Pole Star''' ''(although at the time of the Ancient Egyptions, ‘Polaris’ would not have been in this position)''.

The Sun can be used to find '''True North''' quite simply by placing a vertical stake in the ground and noting which direction the longest shadow points to. More accurately, such a stake can be used to centre a number of concentric circles ''(or a sheet of paper with concentric circles drawn on it can be attached to a board and a large nail driven into the centre)''.

Careful note is then made of where the '''end of the shadow''' ''(or the head of the nail)'' crosses a particular circle both in the morning then again in the afternoon. A line joining the two points marked creates an East-West axis and its '''[[Basic Constructions|Perpedicular Bisector]]''' ''(or '''[[Basic Constructions|Bisector of the Angle]]''' created by the two shadows)'' provides the North-South axis.

[[Category:Terminology]]