Cosmic Gate is a German trance, progressive trance and hard trance duo made up of Claus Terhoeven (aka Nic Chagall) and Stefan Bossems (DJ Bossi). They are best known for their singles "Exploration of Space", "The Drums", and "The Truth." Cosmic Gate has done remixes for popular DJs including Tiesto, Armin van Buuren, and Ferry Corsten. Cosmic Gate's heavy, analogue trance sound is considered by many to be the definition of hard trance.