Final answer:
The answer to the question is option b) Phenomena; Heavens, as Aratus' work 'Phenomena' deals with the constellations and celestial phenomena in relation to the Heavens.
Step-by-step explanation:
Aratus' work BPhenomenaB, was about the nature of the Heavens and weather signs. Hence, the correct option is b) Phenomena; Heavens.
Aratus' Phenomena is a didactic poem written in the early 3rd century BC which describes the constellations and other celestial phenomena.
It was a significant work in antiquity and had an influence on later scholars and works concerning the celestial sphere, including those focused on astrology and astronomy.
The role of the celestial sphere is crucial as it represents the imaginary sphere on which all celestial bodies appear to be projected.