[...then crashed at the end of their million mile journey? ]
Maybe they were using metric and didn’t realize we use standard measurements?
Launching from a distant galaxy, traveling thousands of light years dealing with solar radiation, black holes, meteorites, hydration, nutrition, planetary gravity, temperature control, deceleration, entry into earth's atmosphere, and in the last five hundred feet the aliens need to turn on bright lights to see where they are going?
I've never understood that part at our destination end of the journey.