John Michell Quote

If the semi-diameter of a sphere of the same density as the Sun in the proportion of five hundred to one, and by supposing light to be attracted by the same force in proportion to its [mass] with other bodies, all light emitted from such a body would be made to return towards it, by its own proper gravity.

On the Means of discovering the Distance, Magnitude, etc. of the Fixed - Stars, Philosophical Transactions of the Royal Society of London, 1784