Kosmonauci is a boy band with a jazz background that draws on hip-hop, drum & bass and improvisation in its musical language. The instrumentation, which includes saxophone, bass, vibraphone and drums, creates the group's unique style, balancing between emotional melodies and polyrhythmic structures.

March 21, 2024 saw the release of their debut album Sorry, nie tu. It was released on U Jazz Me, a sublabel of U Know Me Records. It is the inaugural album of the sublabel. It is worth mentioning that the entire run of the vinyl sold out in preorders even before the release. On June 7th, Kosmonauci won the Sanki award, organized by Gazeta Wyborcza, which highlights the most interesting faces on the Polish music scene.