Woah, I think that's out of my league. :) Maybe I should just trust the graph. The graph is good. The graph knows all. lol
But if I knew how to interpret the "percentage error" part of the graph, (in the upper left quadrant), then perhaps I'd feel better about letting the graph speak for...
To give this discussion some more depth I went roaming and roving through the net, and I eventually came upon a PDF file which seams to summarize the observed and predicted values for planets with varying radii and compositions.
I haven't had the time to read it yet, but on page 22 there is a...
I'm trying to figure out what the mass or the average density of the Earth would be if it were made of the same material, but more of it, to the point that its radius were 4 times larger. My ultimate goal is to use this information to predict the surface gravity (relative to that of our current...