The band was active in the 1990s featuring: Agata Harz (vocal), Katarzyna Smoluk (vocal, piano), Robert Niziński (woodwind instruments and keyboards), Lechosław Polak (accordion, keyboards, synthesisers) and Remigiusz Mazur-Hanaj (lyrics, tapes).
That stage in the history of the band was summarised by two records issued by OBUH: EP (New Moon), 1993, and LP (Moon), 1996.
The album was listed amongst 20 most influential alternative music records of the 1990s.
In 2013 it was reissued on the British market thanks to the Penultimate Press.
It was also Penultimate Press that released the band’s latest record – . English premiere was held in November 2015, during the hcmf// (Huddersfield Contemporary Music Festival). The newest album was well received by both Polish and foreign critics, appearing among the best records of the year in Poland and Great Britain.
In 2014 the group reunited. The first concert after the reactivation was set in St. Catherine’s Church during the Unsound Festival in Kraków. Since then Księżyc has been appearing in various places and taking part in different events, e.g. concert with Iva Bittova in Warsaw’s Center for Contemporary Art, Ujazdowski Castle / Laboratorium; open-air performance in Warsaw’s Królikarnia (Rabbit House); concert under the plane trees in Toulouse’s municipal park during Les Siestes Electroniques (France); during the Land Art Festival on the bank of Bug river; in old church on the Energy of Sound Festival in Wroclaw; in Café OTO in London (with Áine O’Dwyer); on KRAAK festival in Brussels, and others.
In 2014 the WIRE magazine in cooperation with the Unsound Festival released a compilation album , and Księżyc appeared there too.
In 2015 Księżyc was nominated to participate in SHAPE programme – Platform for Innovative Music and Audiovisual Art from Europe.
