Hawkwind invented "space-rock"  a hybrid of hard-rock and acid-rock that united the sonic power of the former and the free improvisation of the latter (and Robert Calvert's sci-fi visions) Hawkwind (1970)  In Search Of Space (1971)  Doremi Fasol Latido (1972) and Space Ritual (1973) refined the idea  but theirs was a cult phenomenon that focused mostly on the live performance (somewhat similar to what had happened in the USA with the Grateful Dead) while boasting the frenzied  noisy attitude of the MC5