On Monday, September 8, 2014 5:49:44 PM UTC-4, Double-A wrote:
In 400 BC the philosopher Plato estimated the circumference of the Earth to be 40,000 miles. In 250 BC Archimedes estimated it to be 30,000 miles. Today it is said to be 24,901 miles around. Has the Earth been getting smaller? If the mass has stayed about the same, but shrinking size has brought us closer to the center of mass, that would explain an increase in the pull of gravity over the eons. That is how dinosaurs 70 million years ago could have grown so large! The cooling of the Earth might have made it inclined to shrink. It makes a lot of sense.



Double-A

Gravity pressure at the core can create less volume and more mass. $0% of Sun's mass is at its core. I wonder how that fits in with cores of black holes?? core?? Cores of neutron strars must be very interesting. I have thoughts on just how interesting. TreBert