There is no sound in space, of course, and yet over the years certain conventions have grown up, especially in film, as composers and sound effects people have tried to provide aural equivalents to the sights of stars and planets moving through the void. By now, listeners “know” what space sounds like, and Jonn Serrie’s series of albums, some of their material drawn from the soundscapes he has developed for planetarium shows, well represent these impressions. In the slow-moving patterns, bits of melody and rhythm are heard here and there, but most of the music is open-ended: if not formless, it nevertheless employs loose structures in which moods or themes can stretch or be abruptly terminated. Century Seasons is a two-disc compilation in which tracks from earlier Serrie albums have been remixed and woven together to create a lengthy journey through musical space. There are two newly written tracks that fit in well with the rest. The result is an album that blends familiar sections in new contexts with previously unheard efforts. – William Ruhlmann