Time travel is possible??

Time travel is possible or impossible?

According to me, Time travel is impossible, because time itself is a theoretic concept. Movement of earth is divided in equal intervals and is called time by humans and everything is made relative to it to understand everything.

People started thinking that time too exists as something substantial.

What is time? When earth is moving in a particular forward direction in the galaxy as well as along the galaxy, it is actually time travel for human beings without realizing it. Every micro-second is just an inverval of distance travelled, although it is measured now with the count of radiations.

One may think that they can travel faster if they can make a machine that can travel faster than light, but then as well, only that machine will reach a point faster than earth at a place in space where they cannot see the future or the past of events happening on earth in TIME’s past or future because the things n people on earth would be moving in space at only earth’s pace, and thus according to earth’s respective current time at every moment of its movement.

I guess someone with a lack of proper understanding may try to contradict this with some old-school theory but the reality n practicality of concepts matter more than those theories based more on unproved assumptions than on facts.