Correction, rogue planets are detected when their gravity causes micolensing of distant objects (stars), not the other way around. https://en.wikipedia.org/wik

Correction, rogue planets are detected when their gravity causes micolensing of distant objects (stars), not the other way around. https://en.wikipedia.org/wiki/Rogue_planet#Observation https://en.wikipedia.org/wiki/Rogue_planet#Observation Not an astronomer, but my impression is that microlensing couldn't be used to detect objects in our own solar system, but I don't see any reason why eclipsing of distant stars couldn't be used... it would be far too rare to be practical to find a planet, though.