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Where can i get sounds, musics or one OST that seem like Cosmos (the new tv show inspired in "Cosmos" by Carl Sagan)?
For the sounds/music you should try out Spectrasonic's Atmosphere or Omnisphere.
Or you can use pre-made production music. Sonofind is a good site to start and browse through.
Native Instruments Absynth and Reaktor are good for this sort of Cosmic sound with some routing in your DAW and experimentation you can make one generate the other for some very interesting sounds.
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