Korabl-Sputnik 3 (Russian: Корабль-Спутник 3 meaning Ship-Satellite 3) or Vostok-1K No.3, also known as Sputnik 6 in the West, was a Soviet spacecraft which was launched in 1960. It was a test flight of the Vostok spacecraft, carrying two dogs; Pcholka and Mushka ("little bee" and "little fly"; affectionate diminutives of "pchela" and "mukha", respectively), as well as a television camera and scientific instruments.
Korabl-Sputnik 3 was launched at 07:30:04 UTC on 1 December 1960, atop a Vostok-L carrier rocket flying from Site 1/5 at the Baikonur Cosmodrome. It was successfully placed into low Earth orbit. The flight lasted one day, after which the spacecraft was deorbited ahead of its planned recovery. The deorbit burn began at 07:15 UTC on 2 December, however the engine did not cut off as planned at the end of the burn, and instead the spacecraft burned to depletion. This resulted in it reentering the atmosphere on a trajectory which might have permitted foreign powers to inspect the capsule. To prevent this, an explosive charge was detonated during reentry. Both Pchyolka and Mushka were killed in the resulting disintegration. The only other dog to die in a Soviet space mission was Laika, who was never intended to survive her Sputnik 2 flight.