public ActionResult Edit(SpaceShip spaceShip, int PlanetId, int FuelTypeId, int Id)
 {
     if (PlanetId != 0 && FuelTypeId != 0)
     {
         _db.PlanetSpaceShipFuelType.Add(new PlanetSpaceShipFuelType()
         {
             PlanetId = PlanetId, FuelTypeId = FuelTypeId, SpaceShipId = spaceShip.SpaceShipId
         });
     }
     _db.Entry(spaceShip).State = EntityState.Modified;
     _db.SaveChanges();
     return(RedirectToAction("Index"));
 }