This calendar Was just what was needed for astronomical calculations.

The approach was taken for astronomical and other complex calculations.

It was an astronomical calculation and took her some time.

In ancient time, the astronomical calculations for the entire world were done taking Ujjain as centre of earth.

It also includes a detailed examination of problems involved in astronomical calculations.

Āryabhaṭa seems to have had in mind applications to astronomical calculations.

Other scholars have challenged both this interpretation of the text and the astronomical calculations involved.

We assumed they were used for some sort of astronomical calculation.

They were not astronomical calculations, nor anything to do with a ship's course, run, or position.

As you can see, we are embarking on another of those astronomical calculations.