Años luz literally translates to "light-years". It's a fascinating term because while 'años' means 'years', a light-year is a unit of immense distance, not time.
In this cosmic ballad, Bad Bunny uses the phrase poetically to express the endless nature of his search. When he sings "Yo seguiré buscando mil años luz" (I will keep searching for a thousand light-years), he's saying he would cross the vastness of space to find someone like his lost love, beautifully blending a scientific concept with a feeling of deep longing.
Ever looked up at the night sky and thought about someone you miss? That's exactly where this song starts. Bad Bunny is Mirando las estrellas (Looking at the stars) and it makes him remember a special person. He wonders if there's anyone else out there for him, maybe even en otra galaxia lejos de aquí (in another galaxy far from here). It's a lonely thought, but he takes it to a whole new, cosmic level.
He imagines searching the entire universe for a replacement. He's had a date en la luna (date on the moon) and even says, in a pretty funny and blunt line, Me besé con un alien, tuve sexo con marcianas (I kissed an alien, I had sex with martians). But even after all that, he realizes no encuentro a nadie como tú (I can't find anyone like you). This isn't just a simple love song; it's a wild, sci-fi journey about how one person can feel so irreplaceable that not even a trip through space and time can help you forget them.