BERLIN (AP) — Kraftwerk fans are used to hearing otherworldly tunes, but the German electronic music pioneers took it to another level at a gig in Stuttgart. Video posted Saturday by the European Space Agency shows German astronaut Alexander Gerst "dropping in" for a live performance from the International Space Station. Using a tablet computer with a virtual synthesizer, Gerst played a duet of Kraftwerk's 1978 song "Spacelab" with the band Friday night to cheers from the audience. He's not the first space musician.Read more on NewsOK.com