Somasuthra Pradakshinam is a unique way of circumambulating the GOD.
First saluting the Rishabha Devar (Holy Bull or Nandi) go anti-clockwise and salute Chandishwarar (not crossing the Gomukhi). Now return in the clockwise manner salute Rishabham and continue clockwise till the Gomukhi (not to cross it again). Then return in anti-clockwise direction salute the Rishabham again and proceed towards chaNdIshar. From there return back clockwise without worshiping Rishabham and reach the Gomukhi. Finally return back anticlockwise from there to salute Rishabham and continue to Chandishwarar and return back to Rishabham and worship the Shiva Lingam (at the altar) by viewing through the space between the two horns of the Holy Bull. This is one Pradakshinam. Three such times Pradakshinam to be done. If you carefully observe the curve traced by doing the pradakshinam is very similar to the periphery of the crescent. Hence this way of circumambulating is called Somasutra Pradakshinam.
During the pradhosham time Somasootra Pradakshinam is the recommended way of circumambulating the God. In many of the temples this is followed always. A point to note here is that the gomukhi is never crossed. gomukhi is the place where the water after anointing (abhiSheka theertham) would be flowing northwards out. By doing this way of Pradakshinam one does not step over this holy water.
As per the above marked symbols this Pradakshinams is to be done. First saluting the R^iShabha devar (Holy Bull) go anti-clockwise and salute chaNdIshar (not crossing the Gomukhi). Now return in the clockwise manner salute VruShabham and continue clockwise till the Gomukhi (not cross it again). Then return in anti-clockwise direction salute the RiShabham again and proceed towards Chadeeshar. From there return back clockwise without worshiping Rishabham and reach the Gomukhi. Finally return back anti-clockwise from there to salute Rishabham and continue to chandIshar and return back to Rishabham and worship the Shiva Lingam (at the altar) by viewing through the space between the two horns of the Holy Bull. This is one Pradakshinam. Three such times Pradakshinam is to be performed.
If you carefully observe the curve traced by doing the Pradakshinam is very similar to the periphery of the crescent. Hence this way of circumambulating is called Somasutra Pradakshinam.
SOMASUTRA PRADAKSHINAM (This is performed only during Pradosha Kalam
