Nebula is an American 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 and remained with the band until the recording of Atomic Ritual, notably produced by Chris Goss. Dennis Wilson and Simon Moon (Eddie Glass) stepped in as bassists until a more permanent replacement was found in Tom Davies. Rob Oswald replaced founding member Ruben Romano on drums in 2007.

In August 2009, Adam Kriney, formerly of La Otracina, was recruited to replace departing drummer Oswald, though he too announced his departure in January 2010 and was replaced by Jimmy Sweet. In early 2010, Nebula announced that it was going on an indefinite hiatus. Glass later explained that "things started getting a bit rough with the touring and I got sick of it", though Nebula were merely "taking a break for a while" and not breaking up.

Nebula reunited in 2017 and now features drummer Michael Amster of Blaak Heat and Mondo Generator. The band released their sixth studio album, Holy Shit, on June 7, 2019, on the Heavy Psych Sounds Records label. Their seventh studio album, Transmission from Mothership Earth, was released on July 22, 2022.

Longtime bassist Tom Davies died from leukemia on September 5, 2023, at the age of 48. Touring bassist Ranch Sironi died in Rome on the morning of June 5, 2024, while the band was touring in Italy.