Sure, but that’s not impressive and you’d expect him to be close to right about those numbers. As I understand it, it’s pretty easy to derive the volume of planets from optical observations of diameter, and the mass from their orbits & Newtonian mechanics, and then divide to get net density.
Sure, but that’s not impressive and you’d expect him to be close to right about those numbers. As I understand it, it’s pretty easy to derive the volume of planets from optical observations of diameter, and the mass from their orbits & Newtonian mechanics, and then divide to get net density.