The study about celestial objects of the universe is called?

The study about celestial objects of the universe is called?

کائنات کی آسمانی اشیاء کا مطالعہ کیا کہلاتا ہے؟
Explanation

The telescope is undoubtedly the most important investigative tool in astronomy.

A celestial body that revolves around a planet is known as a natural satellite.