The Beatles' "Here Comes the Sun" was almost put on the Voyager Golden Records and sent out to space, but EMI refused to release the rights
The Voyager Golden Records were phonograph records which were placed in the Voyager spacecrafts launched in 1977. The purpose of the records was to portray the diversity of life and culture on Earth, designated for any intelligent life in the universe who might find them.
The Voyager spacecrafts are still out there today, both with a long journey ahead of them. Given the time it will take for them to be near other stars (about 40,000 years for one of them), some have even suggested that before then we’ll have developed space travel superior in speed to the spacecrafts and that they’ll be obsolete long before reaching anyone.
Carl Sagan was an astronomer working on the project back in the 70’s. He had wanted “Here Comes the Sun” included on the records, and The Beatles favored the idea. Unfortunately, EMI refused to release the rights (probably because of the copyright infringing habits of aliens) and so it was not included.