@bunnyknightsaid I don't think anyone knows the exact maximum planet size or mass. The thing with massive planets is that their strong gravity attracts gas, and they eventually puff up like a giant fluffy pillow, so it's impossible to see how big the solid part actually is.
"Strong gravity makes me gassy" would be a heck of a bumper sticker.
@bunnyknightsaid I like iron. I think iron is cool. I once got to touch this big 10 ton meteorite with my bare hands; it resembled Swiss cheese and was the most beautiful piece of pure iron I've ever seen.
But I'm not sure that the meteorite they have now is the same one I saw decades ago. It does look similar but not exactly as I remember. Mine seemed smaller, nicer and even cooler, plus the exhibit room, the orientation and the placement have totally changed.
Anyway, when I knocked on it I nearly broke my knuckles yet it made no sound - that's how massive it was.
And realizing that it may be billions of years old made my fur stand up in terror - imagine some 4 billion year old alien super-predator-microbe jumping into my hand .......