Nebula are a psychedelic stoner rock band, formed by guitarist Eddie Glass and drummer Ruben Romano upon departing Fu Manchu in 1997. Mark Abshire soon joined as the band's original bassist. Nebula have been on indefinite hiatus since early 2010 but have not broken up.

Abshire remained with the band until the recording of Atomic Ritual (2003) which was produced by Chris Goss of Kyuss fame. Dennis Wilson & Simon Moon (Eddie Glass) stepped in as bassists until a more permanent replacement was found in Tom Davies. Atomic Ritual was released to warm critical praise, with AMG calling Nebula a "hard-working power trio [that] sounds like it has been hanging out in the garage since 1973, blissfully unaware of the changing world outside. Which is definitely to its benefit". [1] Rob Oswald replaced founding member Ruben Romano on drums in 2007.