The discography of the British space rock group Hawkwind spans from their formation in 1969 through to the present day, with consistent output of live and studio albums, EPs and singles. The group have used aliases to release some albums in an attempt to either redefine themselves, as with the 1978 album 25 Years On released under the name Hawklords, or simply to distinguish the piece of work from their usual output, as with White Zone released under the name Psychedelic Warriors. From 1970 through to 1975, the group were contracted to Liberty/UA producing their most commercially successful and critically acclaimed work, five studio albums, the UK top 9 live album Space Ritual and five singles, including the UK top 3 single "Silver Machine". This catalogue is now owned by EMI and is in print. The mid-late 1970s saw them produce four studio albums under contract to Charisma. In the early 1980s, they produced a studio album and live album under contract to Bronze in 1980, then three studio albums for Rockfield Studios owner Kingsley Ward's Active/RCA.