if a stellar Mass black hole enters our solar system it will cause significant disruption firstly its tremendous gravity would change the orbit of every object Earth could be entirely ejected from the solar system if the black hole passed close enough alternatively our planet could be pulled into a new more elliptical orbit causing extreme variations in temperature and making Life as we know it impossible if the black hole approached the sun closely its gravity could draw away the sun's matter through tidal disruption forming an accretion disk around the black hole this could lead to a significant
loss of the Sun's mass in addition the matter pulled from the Sun and other bodies would heat up and emit high energy radiation including X-rays and gamma rays this surge in radiation could potentially sterilize our planet seriously impacting most life forms so a black holes addition would change the entire solar system as we know it