The MAXIMUM altitude you could get to that flightgear can display before losing track!

This was after getting curious about the possibility of landing on the sun (shown in the video) or the moon (I don't know about trying to land on that thing), I spent a considerable amount of time finding and aligning the UFO completely vertical with the sun, while being about 15 km from the ground.

Then I straight up and adjusted the maximum speed to 1,000 km/s (1 gigameter) and all. Then this video was made after discovering the maximum trackable altitude 2,147,483,648 (if this is in meters, that's what I should say, 2.14 Gigametres).

That was the most interesting part I thought would make for a video.