This album is an extension of that interest with Hart using 'the billion year old orchestra of planetary motion' as a kind of reference or backbeat that grounds each of the songs on Mysterium Tremendum.

The combination of cosmic sounds, electronic and hand percussions, and conventional rock instruments are interwoven to create a sonic ambiance that is completely contemporary and enveloping.

But, those hoping for a New Age soundtrack will be sorely disappointed; this is hard and driving music blessed with a melodic sensibility that is far more front and center than we've heard from Mickey in some time.

Hart sets most of these tunes, with lyrics co-written by Robert Hunter, on simmer but never on boil, making for a cool, calm and collected album.

"[9] Writing in the Ballard News-Tribune, Christy Wolyniak said, "The album consists of an epic, strange collaboration of sounds from the universe, so alienated and odd that one might feel they are experiencing a completely new world.