Main Question or Discussion Point
The Newtonian theory is strictly speaking false and it has been superseded by the theory of relativity. However, it is more simple and easier to apply than the theory of relativity. Also, in some situations, the results do not differ significantly. The question is: is the Newtonian theory still being used in real scientific practice? Do they use it to launch satellites or for any other scientific purpose? Or rather it has only a didactic and historical value?