The [Johns Hopkins University Applied Physics Laboratory website](http://pluto.jhuapl.edu/Mission/The-Path-to-Pluto-and-Beyond.php#page-top) depicts the New Horizons flight path as almost a straight line after the Jupiter flyby. Could a spacecraft travel from the outer solar system to the Earth in a similar straight line with enough propulsion. Is that amount of propulsion feasible with current technologies, even for a small spacecraft?

[![enter image description here](https://i.stack.imgur.com/keQ2N.png)](https://i.stack.imgur.com/keQ2N.png)