When we last caught up with Zachary Mason in February, “Sweetheart” found him trading cosmic distance for emotional closeness, wrapping a sincere declaration of love in hazy guitars, hypnotic vocals, and a grungier, heavier rock sound. It was a compelling reminder that behind Mason’s space-bound imagination lies an artist equally interested in the mysteries of the human heart. Now, with “Man Of The Universe,” he points his musical telescope back toward the stars, swapping rom