That's just called memory or picturing how something was.
With that logic, it is possible to go to Paris, France in our imagination.
Yes, it is possible to go to Paris in our imagination. And Paris is so overlaid with imagination, even when we go there physically, we also go there in our imagination.
And there is a physical problem with travelling back in time, and that is entropy.
Entropy makes travelling back in time physically impossible.
However we can imagine travelling back in time and we do.
It's just that travelling back in time in our imagination has a different meaning than travelling back in time in reality.
--------------------------------------------------------------------------
The work of children is play. And in play we learn to distinguish between imagination and reality. This is a key psychosocial development on which both art and science depend. However when we don't fully complete this life task, we are tempted to confuse imagination and reality, particularly when we are under stress.
Both astrology and mbti conflate imagination and reality, as do cults and religions. Also we commonly conflate imagination and reality when we make celebrities of movie stars and singers.