Easins

The easins (frae Greek orizein, tae leemit) is the line that spleets the yird frae the lift. But at mony airts the true easins canna be seen as thare are trees, biggins, muntains an sae furth. The line is than cried the veesible easins. 

 Fermit airtins 

 Derivation o the distance tae the easins

Category:Horizontal coordinate seestem
Category:Celestial coordinate seestem