public void TravelTo(Planet otherPlanet)
{
var warp = ship.speed;
var distance = location.DistanceTo(otherPlanet);
var speed = Planet.WarpToLightYearsPer(warp);
age += distance / speed;
location = otherPlanet;
ship.TravelTo(otherPlanet);
}
public void TravelTo(Planet destination)
{
mileage += currentPlanet.DistanceTo(destination);
currentPlanet = destination;
}