I was half expecting a ton of upvotes and no comments.

I mean, that was my first thought… but would there be a measurable difference?

I mean lets be clear, with a fan you’re adding like 8 mph to something going 299,792,458 meters per second. You won’t notice anything.

But like, vacuum vs glass vs glass moving half the speed of light, could be an interesting what if. Relativity is always where my mind glosses over in physics.