Will a very large rocky planet have a super heavy force of gravity holding us to the ground really hard or can we still run around fairly easily like we do here on Earth. I keep hearing a lot about large Earth and I don't want to have to try a lot harder to lift my leg because the gravity so much stronger on a planet I want to be able to still move around like I do now any thoughts on that?,(reply>), Like on Venus they said the atmosphere would crush you down into a little ball I want a nice rocky planet that I can walk on without being crushed so that's definitely a necessary aspect for me to be happy,(reply>), Explain what causes heavy gravity on a planet please