is it possible to make a "gravity mirror"? Does anyone out there know if under today's accepted laws of physics it would be possible for something to exist that could reflect gravity?. The reason I ask is because I am a bit of a late starter with this physics thing. I did schoolboy physics when I was young but got no further education on the subject. Over the last couple of years I have become interested enough to read quite a few books on various physics subjects published for the general public. This means my understanding of the subjects might be a bit skewed. The trouble with books is you can't ask them a straight question. I suppose my question is really about the relationship between mass, inertia and gravity. Could you theoretically insulate an object from gravitational effects? And if so would this have any bearing on its mass or inertia? This is my first posting on this site so please don't shout too loud if my question is stupid. But if it is stupid then a layman's explanation of why would be very much appreciated.