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Results tagged with earth
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user 25313
Questions regarding the planet on which humans live; the third planet from the Sun.
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What was Earth's mass before the collision with Theia?
I'm not sure if there was a significant amount of debris, however the calculation you mentioned would at least give an upper bound on the value:
$
M_{piE}=\text{Greatest possible mass of pre-impact Earth … }\\
M_E=\text{Mass of Earth today}=6.0\times10^{24}kg\\
M_M=\text{Mass of the Moon}=7.3\times10^{22}kg\\
M_T=\text{Mass of Theia}\approxeq6.4\times10^{23}kg\\
$
$$
\begin{eqnarray*}
M_{piE}&=&M_E+M_M-M_T …
