Hello everybody! I have a question that's been bugging me for some time now, considering density and mass and gravity and so on. I'm writing this short story for a local magazine (Yes, it's Sci-fi ) and I came upon the idea that you could make what I call a "Gravity bomb." A weapon that would use gravity to destroy... well, stuff. And here is how I pictured it. It would look like a typical rocket-type missile, but instead of being filled with gunpowder and exploding on impact it would - after some kind of chemical reaction within or something - I don't know - acquire such a big mass that it would have such a powerful gravity field that it would suck in everything in it's surrounding, ripping trees out of the ground, tearing down buildings, lifting cars and people in the air and towards itself. And after some time, let's say 30 sec, it would destabilise and explode, blowing away everything that it had pulled toward itself and thus causing more damage. (I'm evil, I know) I thought of a dying star, but kinda in reverse (and a lot lot smaller )... First having this small object or something with a lot of density that would then destabilise and explode. I'm currently going for this: The missile would have something inside like materials that would, upon impact with an object/ground, react with each other and have a far greater mass than they had before - and I'm talking HUGE mass - thus creating this BIG gravitational field. The new material would be highly unstable and would destabilise fast, whether in contact with the air or in another way, causing it to explode. Now, the big question ! Would anything like this be even remotely possible? Could you, if you had the technology, make two or more (hypothetical) materials react in such a way, that the resulting material's structure would arrange itself in a way that there would be almost no space between it's particles or atoms, resulting in high density and therefore a very strong gravitational pull. And could it be possible that anything as small as a soccer ball would have all these properties? Would you do it using nanotechnology? Just a chemical reaction? What do you think would be the (easiest) way to accomplish this? Or am I going about this completely the wrong way and should just go and lock myself in the closet for talking complete nonsense? So come on great minds, help me out here and offer me a your opinion/new idea/anything! I mean, sure, I could just make stuff up to explain this, but I would actually like a little science behind it.