The north star is the most common reference point.
reference point
An origin or zero point.
A reference point helps to explain why we are, where we are.
If your reference point it moving, then it cannot be considered a reference point. Your reference point should be something constant. Something that can be relative to any situation. If it moves, you lose this relativity.
The north star is the most common reference point.
Earth's surface is a common reference point for detecting motion.
Earth's surface is a common reference point for determining position and motion.
reference point
An origin or zero point.
A Neutral, Common, or Ground.
A reference point helps to explain why we are, where we are.
What is the fixed reference point in the photos?
Its position, relative to the point of reference.
If your reference point it moving, then it cannot be considered a reference point. Your reference point should be something constant. Something that can be relative to any situation. If it moves, you lose this relativity.
Without a fixed Point of Reference, there is nothing to be relative to.
No because enable to see if the object is moving it needs a reference point other than itself.