Spacemen 3 were an English alternative rock band, formed in 1982 in Rugby, Warwickshire by Peter Kember and Jason Pierce. Their music is known for its brand of "minimalistic psychedelia". Spacemen 3 had their first independent chart hits in 1987, gaining a cult following, and going on to have greater success towards the end of the decade. However, they disbanded shortly afterwards, releasing their final studio album post-split in 1991 after an acrimonious parting of ways.

Most members of Spacemen 3 have continued to produce music and record either collaboratively or in solo projects. Peter Kember (alias 'Sonic Boom') has had a solo career releasing music under the monikers Spectrum and E.A.R., and has also done production work for MGMT, Panda Bear, Dean & Britta and The Flowers of Hell. Jason Pierce (alias 'J. Spaceman') remains the leader and creative force, and only constant member, of the alternative band Spiritualized who have achieved significant critical acclaim and commercial success. Both Kember and Pierce continue to perform some Spacemen 3 songs live (e.g. "Transparent Radiation", "Revolution", "Suicide", "Set Me Free", "Che" and "Let Me Down Gently" [Kember]; and "Take Me to the Other Side", "Walkin' with Jesus", "Amen" and "Lord Can You Hear Me?" [Pierce]).  Will Carruthers, Jonny Mattock and Mark Refoy formed Spiritualized with Pierce in early 1990. Carruthers left the band after the first album in 1992; followed by Mattock and Refoy in 1994. Refoy then fronted Slipstream who released two albums. Refoy played guitar for the Pet Shop Boys on their live tour in 2007. Will Carruthers took a hiatus from the music industry after leaving Spiritualized; but subsequently has worked with Kember, recorded two solo albums as Freelovebabies, and has most recently toured with The Brian Jonestown Massacre. Carruthers, Mattock and Refoy have also collaborated on projects together.  After leaving Spacemen 3 in 1988, both Pete Bain and Stewart Roswell ('Rosco') joined the neo-psychedelic band Darkside who released several albums. Following the end of Darkside, Bain formed 'Alphastone', and has assisted Kember on some of the latter's solo projects. As of 2010 he provides vocals and guitar in 'The Urgz'. Stewart Roswell (alias Sterling Roswell) released a solo album, The Psychedelic Ubik, in 2004.  In the early 1990s, early Spacemen 3 drummer Natty Brooker played bass under the alias 'Mr Ugly' in Garage rock band 'The Guaranteed Ugly', with Gavin Wissen. They released two albums. Brooker provided cover artwork for Spacemen 3's Recurring album and early Spiritualized releases. Brooker died of cancer on Friday 18 April 2014.Answer this question using a quote from the following article:

What did the fourth member do afterwards?
Jason Pierce (alias 'J. Spaceman') remains the leader and creative force, and only constant member, of the alternative band Spiritualized who have achieved significant critical acclaim and commercial success.