I tried calculating the mass of the core of the sun but keep coming up with a number that exceeds the entire mass of the sun. I used http://en.wikipedia.org/wiki/Sun" [Broken] facts on the sun. It says the core of the sun extends from its center to .2 to .25 times it's radius. I used the number .225 as an average. So this would make the volume of the core to be (.225)^3 or .011 times the sun's total volume. The volume of the Sun is stated to be 1.412e18 km^3 or 1.412e27 m^3. Thus the volume of the core is .011 x 1.412e27 km^3 or 1.608e25 km^3. Now http://en.wikipedia.org/wiki/Sun#Core" says the density of the core is about 150g/cm^3 or 1.5e5kg/m^3. So since mass = density x volume I get the mass of the core to be: 1.5e5 x 1.608e25 kg = 2.413e30 kg. This exceeds the state mass of the sun (1.9891e30 kg). What is wrong here?