Great pull quote.
For people new to the Tully-Fisher relation, the essence of it is that at galactic scale, gravity is not like v^2/r = GM/r^2.
It's more like v^2/r ~ sqrt(GM/r^2), so v^4 ~ M
For people new to the Tully-Fisher relation, the essence of it is that at galactic scale, gravity is not like v^2/r = GM/r^2.
It's more like v^2/r ~ sqrt(GM/r^2), so v^4 ~ M
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