Wasn't sure what to title this. All credit goes to the original calculator, whoever he may be.
Using Australia as a low end for "Continent".
Full Brain: 955.69 Pixels
Just the spherical bit's diameter: 525 or 2,220.5 km
Sphere Volume: 4.586e19 m^3
Iron: 7850 kg/m^3
Mass = 7.2e22 kg
U = 3G67408 x 10-11 m3 kg-s -2(m^2)/5(1 110.25) = 1.8829e32 J
If GBE is accepted, I ca try my hands at a kinetic energy calc.