K 10 svn:author V 3 mph K 8 svn:date V 27 2003-11-05T22:29:48.000000Z K 7 svn:log V 216 Add r_earth, r_moon, r_sun, representing the terrestrial, lunar, and solar radii. The corresponding masses (m_earth, etc.) were already present. Source: "An Introduction to Modern Astrophysics," Carroll & Ostlie. END