So I'm having a problem with relativity. If something is traveling at half the speed of light away from you (on Earth), the time on that object slows to half, is that correct? If that is correct, then relatively, if you where on the object, the Earth would be moving away from you at half the speed of light and time on Earth would slow to half. This obviously can't be right, because they cancel each other out. What am I missing here?