Re:Chemistry says Moon is proto-Earth’s mantle, relocated
by AnimalMuppet on Monday September 12, 2016 @06:43PM
(#12484279)
Note, however, that the surface is also at a slightly larger radius from the center of that increased mass, so the net increase in surface acceleration is less than 1.2%.
[Edit: Note that the moon is less dense than the earth. By my calculations, adding the moon's material to the earth (and keeping it at the moon's density) would increase the earth's radius by 43 km, and (if you accept the parent's 1.2% mass increase figure), the surface acceleration would be 0.998 times the current value.]
[Edit: Note that the moon is less dense than the earth. By my calculations, adding the moon's material to the earth (and keeping it at the moon's density) would increase the earth's radius by 43 km, and (if you accept the parent's 1.2% mass increase figure), the surface acceleration would be 0.998 times the current value.]