Neutron stars, such as the one at the center of the crab nebula, have about the same mass as our sun, but a much smaller diameter.

if you weigh 670 on the earth, what would you weigh on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0 ?

Below is the

W = mg 

W = ? 
m = 670 
g = ? 

radius of Neutron star = 11.5 km = 11,500 meters 

We need to find g on the Neutron star, so: 
g = GM/r^2 
g = 6.67 x 10^-11 x 1.99 x 10^30/11,500^2 
g = 1 x 10^12 

W = 670 x (1 x 10^12) 
W = 6.7 x 10^14 N

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