Can someone tell me the answers to these questions. 1. Does a black hole only pull in stuff that falls into the event horizon or is it actually pulling in the space around it as well. E.g. is it like pulling the plug in the bath where the water i.e. space is being sucked in which is pulling the planets as well? 2. Can a black hole grow? - My understanding of a black hole is that it's size depends on the mass of the original star. Then once the BH has been created it will remain the same size unless it's not sucking any matter in which will make it shrink. Meaning that it can only stay the same size or get smaller?