Excellent--I think I get it now! Yeah, I was referring to speed of recession rather than the distance from the observer. sophiecentaur, I guess your "frequency" reference is analogous to Nugatory's "frame" reference.
Thanks all for the explanation! So, is it fair to say that if the video on the spaceship was of people playing basketball, then the further away the spaceship travels from me, then the more they will be seen to play in slow motion?
Hi, I've just discovered this site, and I'm hoping someone can give a lay answer to the following question:
Imagine I'm watching a constant live feed from a camera on a spaceship that's next to me, and this spaceship then takes off to Mars. When the spaceship reaches Mars, the video feed that...