Travelling at the speed of light?[Question]

[Heat]

From his perspective, realizing at launch Andromeda is 2 million light years away, and then arriving there 40 years later, he can do the math and calculate how fast he was going, and the number is 50,000X.

As for us pudgy stay at homes, we've seen multiple ice ages come and go, and probably forgot all about our wayward traveler pretty early on.

Yeah but that does not mean that he was in fact going 50,000 times the speed of light during his trip that's just the illusion given because of our choice to accept general relativity. 


It only appears to be 50,000X if we don't do the math, if we were(as in us observing him) we would still get the same conclusion that he got if we factored in the same events he experienced.


This might be a bad example, if it is, sorry, i barely understand this stuff as it is;

But say for example you saw a video of a baseball being thrown to a catchers glove, and then just as the ball leaves the pitchers hand, the ball suddenly goes 20 times faster while in air, and only after making contact with the catchers mitt everything seems normal speed again. Sure, it seems like it is going 20 times that speed to the viewer, and to the ball it will seem like it traveled the same amount of distance in the air in a much shorter time span, but if we factor in the fact that the video was sped up and deduct the speed that was added, we will come to the same conclusion of how fast the ball actually traveled in air as the ball would.



I'm not just arguing for the sake of arguing
I just find all this stuff so fascinating. For the past year i've had my sights set on being an astronomer one day if possible. I can't accept that people can somehow not find space interesting. It's like saying you don't find anything interesting, because space by definition is everything. This doesn't really pertain to the response I gave you but i'll just post this anyway cause it's my favorite video of all time: