Can someone say that the distance being observe.is different.. compare to real distance?

Question

The situation is this, at first the observer and the object are in the same point or place , at time equal to zero the object was trying to move away to the observer applying a constant speed,

Let say that the speed of the object is 75% the speed of light..

After exactly 100 seconds,.....

ofcourse the real distance of the observer to the object were (75%the speed of light times 100seconds) ,

but the problem is this, what would be the distance observer will observe?

will it be the same distance as real distance?

For as i caculate it gives me an answer, which is a observable distance of 56.7%of real distance....

the problem above are trying to assume that..it was projected at a constant speed, it ignores anythings that can affect its constant speed.....

there's nothing to say about special relativity....

its only focused on the side of the observer and not the inside the object being observed.....

Answer 1

The moving object and the stationary observer would measure different times as well.  The 100 seconds for the stationary observer would pass in the same "time" as 66 seconds tick by on the moving clock.

Mind you, this whole thing gets into the "twin paradox", which needs general relativity to properly disentangle (short form: there's no special constant speed, but you CAN say who's accelerating and who isn't).