On the Equinoxes the day and night are the same length.
An equinox occurs twice a year around 20 March (Vernal Spring)and 22 September,
Vernal Equinox on 20-21March, is when the Sun Rises "exactly from East." From this day it will rise a little North of East.
(Jargon- the Earth's equator is same celestial equator on the celestial sphere.)
(Jargon- the Earth's equator is same celestial equator on the celestial sphere.)
A solstice occurs twice a year (around 21 June and 21 December), on 21 June, the Sun reaches its highest, or Northern most the Sun rises ie. 23° north of East
On 22 September, Winter Solstice, the sun reaches the lowest (Southern most the sun rises, ie 23° South of East) excursion relative to the celestial equator.
Ecliptic Path.
The Path of the Sun, Moon, Planets take across the sky and all the 12 "Zodiac" Constellations are along this Path in the sky.
The Path of the Sun, Moon, Planets take across the sky and all the 12 "Zodiac" Constellations are along this Path in the sky.
See this interactive graphics
http://ecuip.lib.uchicago.edu/diglib/science/cultural_astronomy/interactives/woodhenge/woodhenge.html
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