3) Which is more dense Jersey City or the North Pole with human beings?

Yes They are sinks of radiation and particles and debris originating from stars.

Once the process of their gravitational accumulation of radiation and particles and debris starts, their gravitational attraction increases as their masses increase and the more this happens the more dense they become, except some planets are more dense than others so a dense planet is not necessarily a big planet; some planets are very large but not very dense and other planets are small with great density.

The answer is cometm