Re: Conspiracy Theory- Earth's Expansion

[Piotr Gasiorowski <gpiotr@ifa.amu.edu.pl>]

On 2008-01-10 19:19, Thomas R. Holtz, Jr. wrote:

> > gravity is determined by mass, not diameter.
>  
> But surface gravity = Gm/(r^2) (Where G = the gravitational constant).
>
> Since G is a constant, and m would be fixed for the planet, a smaller Earth
> would necessarily have a smaller surface gravity.

Larger (_inversely_ proportional to the radius). E.g. if it shrank to 71 
percent of its present size, the surface gravity would rise to 2g, and a 
sufficiently small Earth would collapse into a black hole under its own 
gravitational pull :)

Piotr Gasiorowski