system
Given the following post, respond as if you're commenting on Reddit:
human
How large does an object have to be for it's gravity to noticeably affect light?
gpt
"Noticeably" really depends on how sensitive your detector is. If your detector is the human eye, even the sun isn't massive/dense enough.  Even a white dwarf would only deflect light by a small fraction of a degree. With more sensitive detectors, light deflection around Jupiter has been observed.