Apollonius Revisited Equidistance

- This tool will be handy if, say, you wished to create a model of the solar system withthe planetary orbits as ellipses. In such a construction the sun would be at F1 and all theorbits would have F1 in common but F2's different.-Please note that if you move F1 outside the circle F2 you get a hyperbola with 2branches