Hello there! I just made this account today because I figured this place would be a good way to get some answers to things that have bugged me for years. I'm not particularly sure how this would even work, so bare with me here. There is a critical density at which a black hole forms, which should never be possible for a planet to my small knowledge. My question is, if there were a planet hundreds of timers larger than our sun, would it collapse into a black hole? If a large core of it were hollow with a structure built within to prevent it caving in, would that prevent it collapsing under it's own mass? And how would it affect the Gravity you felt standing on this behemoth? Could man even stand on something so large or would the gravity simply crush us into a puddle? I was thinking that the sheer distance from the centre of gravity might have some sort of effect on the forces exerted on us, but I'm probably totally wrong. Thanks for taking a look, and any answers I get!