Earth

Neutron

Mass

5.97 × 10²⁴ kg

1.67 × 10⁻²⁷ kg

Volume

~[6.378 × 10⁶ m]³

~[10⁻¹⁵ m]³

Mass density

${\rho }_E=5.513\times {10}^3$

${\rho }_n=4\times {10}^{17}$