For the departure and the arrival you have to complete 3 boxes.
enter the number of points you want.
the time (in years) from which you want to make start your graph, knowing that 0.0
corresponds to the departure year of the current trajectory.
enter the time (in years) until which you want to display the graph.
In addition, if you want know the distance to a third planet, you can enter the
planet name and the date where the ship would reach the planet.