I thought the same, but amazingly, there are some early results that suggest a transit was observed in another galaxy: https://science.nasa.gov/universe/exopla

I thought the same, but amazingly, there are some early results that suggest a transit was observed in another galaxy: https://science.nasa.gov/universe/exoplanets/exoplanet-discoveries/first-evidence-of-a-planet-identified-beyond-our-galaxy/ https://science.nasa.gov/universe/exoplanets/exoplanet-disco... https://en.wikipedia.org/wiki/Extragalactic_planet https://en.wikipedia.org/wiki/Extragalactic_planet