question_answer

The International Astronomical Union (IAU) is a collection of professional astronomers who act as the internationally recognised authority for assigning designations to celestial bodies. It also assigns names to constellations. How many constellations have been formally named by the IAU?

A)  150 constellations in Southern hemisphere

B)  88 constellations in Southern and Northern hemisphere

C)  88 constellations in Northern hemisphere only

D)  150 constellations in Northern and Southern hemisphere