In Temple construction two important things are to be fixed before starting

1. The auspicious time for the beginning in Boomi Pooja, Kumbha Abhishekam etc.
2. The fixing the Directions (mainly 8, North, East, South, West and the 4 in between directions).
Here Astronomy plays the important role and based on it only the construction proceeds.

Astronmy and Sankusthapanam in Temple construction