From Beyond the Stars Achievement
From Beyond the Stars15
Collect and return all spaceship parts.
While playing as Franklin, you will eventually encounter a mission called, “Far Out One”, which will be designated on your map by a green question mark icon. This mission will direct you to a man named Omega in east Sandy Shore. He will recount a ridiculous tale about an alien ship that crashed in San Andreas and it is up to you to recover all 50 space ship parts for him.
Although this is a Franklin-only mission, you can still recover the ship parts while playing as Michael and Trevor. Each collectible will have a bright gold aura and emit a small humming sound when you are near them. Keep in mind that some parts can only be reached with a helicopter, but you can easily get one from the Los Santos Hospital helipad. If you don't know where that is, jump to 10:39 in the video below and you will see its location. Once you have collected all 50 parts, return them to Omega and the achievement, plus a very unique vehicle, will be yours.
Refer to "A Mystery, Solved" for a great tip on how to collect the space ship parts quicker, using the taxis in the game, if you do not always have a helicopter.