What makes Planetary Unfolding by Michael Stearns notable?

'Planetary Unfolding' is notable for its early exploration of environmental themes within music, aligning with the growing interest in ambient soundtracks during the early '80s. Its reception included praise from critics, contributing to Stearns' recognition as a pioneer in the genre, influencing later artists who embraced atmospheric and immersive soundscapes. When 'Planetary Unfolding' was released in 1981, Michael Stearns was emerging as a significant figure in the ambient music scene, following his earlier works that established his reputation. This album represents a pivotal moment in his career, showcasing his evolving sound and expanding the boundaries of ambient music at the time.