deletions | additions       diff --git a/The Moon.tex b/The Moon.tex  index f1c290e..1ed3d2c 100644  --- a/The Moon.tex  +++ b/The Moon.tex 
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A more precise estimate is $1.7374\times10^8$~cm.   \item {\it What is the Moon's mass?}  The Moon is made out of mostly the same stuff as the Earth, so $M_m = \rho_\oplus (4/3 \pi R_m^3) = 5.5 \times 4 \times (1.6\times 10^8)^3 = 9\times 10^{25}$~g, or about 1\% the mass of the Earth.  \end{enumerate}