Zenith

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-'''[[Zenith]]''' is the direction pointing directly "above" a particular location; that is, it is one of two '''[[vertical]]''' directions at the location, orthogonal to a horizontal flat surface there. The concept of "above" is more specifically defined in astronomy, geophysics and related sciences (e.g., meteorology) as the vertical direction opposite to the net gravitational force at a given location. The opposite direction, i.e. the direction of the gravitational force is called the nadir. The term zenith also refers to the highest point reached by a celestial body during its apparent orbit around a given point of observation. This sense of the word is often used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low '''[[latitude]]'''s.+[[Image:Zenith-Nadir-Horizon.svg.png|thumb|300px|Diagram showing the relationship between the Zenith, the [[Nadir]], and different types of [[Horizon]]. Note that the Zenith is opposite the Nadir.]]
 +[[Image:Horizontal coordinate system 2.png|framed|HORIZONTAL COORDINATES. '''[[Azimuth]]''', from the North point (red) -also from the South point toward the West (blue). '''[[Nadir]]''' is in the opposite direction, south. '''[[Altitude]]''', green.|300px]]
-[[Image:Zenith-Nadir-Horizon.svg.png|thumb|300px|none|Diagram showing the relationship between the Zenith, the [[Nadir]], and different types of [[Horizon]]. Note that the Zenith is opposite the Nadir.]][[Image:Horizontal coordinate system 2.png|framed|none| HORIZONTAL COORDINATES. '''[[Azimuth]]''', from the North point (red) -also from the South point toward the West (blue). '''[[Altitude]]''', green.]]+'''[[Zenith]]''' is the direction pointing directly "above" a particular location; that is, it is one of two '''[[vertical]]''' directions at the location, orthogonal to a horizontal flat surface there.
-----+
-Also See+
 +The concept of "above" is more specifically defined in astronomy, geophysics and related sciences (e.g., meteorology) as the vertical direction opposite to the net gravitational force at a given location.
 +
 +The opposite direction, i.e. the direction of the gravitational force is called the '''[[nadir]]'''. The term zenith also refers to the highest point reached by a celestial body during its apparent orbit around a given point of observation. This sense of the word is often used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low '''[[latitude]]'''s.
 +
 +
 +== '''Also See''' ==
*'''[[Vertical drop]]''' *'''[[Vertical drop]]'''
*'''[[latitude]]''' *'''[[latitude]]'''
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*'''[[Global Positioning System]]''' *'''[[Global Positioning System]]'''
*'''[[Sunlight]]''' *'''[[Sunlight]]'''
- +*'''[[Azimuth]]'''
 +*'''[[Sunrise]]'''
 +*'''[[Sunset]]'''
---- ----
Return to '''[[Snow and Weather Glossary]]''', '''[[Working with Snow]], [[Freestyle Skiing]]''' Return to '''[[Snow and Weather Glossary]]''', '''[[Working with Snow]], [[Freestyle Skiing]]'''
[[Category:Freestyle Glossary]][[Category:Working with Snow and the Weather]][[Category:Weather]][[Category:Snow]][[Category:Freestyle Course Preparation]] [[Category:Freestyle Glossary]][[Category:Working with Snow and the Weather]][[Category:Weather]][[Category:Snow]][[Category:Freestyle Course Preparation]]

Current revision

Diagram showing the relationship between the Zenith, the Nadir, and different types of Horizon. Note that the Zenith is opposite the Nadir.
Diagram showing the relationship between the Zenith, the Nadir, and different types of Horizon. Note that the Zenith is opposite the Nadir.
HORIZONTAL COORDINATES. Azimuth, from the North point (red) -also from the South point toward the West (blue). Nadir is in the opposite direction, south. Altitude, green.
HORIZONTAL COORDINATES. Azimuth, from the North point (red) -also from the South point toward the West (blue). Nadir is in the opposite direction, south. Altitude, green.

Zenith is the direction pointing directly "above" a particular location; that is, it is one of two vertical directions at the location, orthogonal to a horizontal flat surface there.

The concept of "above" is more specifically defined in astronomy, geophysics and related sciences (e.g., meteorology) as the vertical direction opposite to the net gravitational force at a given location.

The opposite direction, i.e. the direction of the gravitational force is called the nadir. The term zenith also refers to the highest point reached by a celestial body during its apparent orbit around a given point of observation. This sense of the word is often used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low latitudes.


[edit] Also See


Return to Snow and Weather Glossary, Working with Snow, Freestyle Skiing

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