Every planet will become colder by time
Every planet has a hot core and a cold crust; by time the planet will lose its internal heat by radiating this heat, by eruption of volcanoe ...etc. until time will come when this planet will have a cold core, then the planet will stop its axial rotation, but will keep circling around the Sun with one face facing it (just like our Moon does with the Earth)
When the planet will become cold,
it will stop its axial rotation, and will lose its gravitational power, and lose its moons and satellites,
It will contract and its surface will have many fissures and grooves.
Then its gaseous layers will mix with each other --> to form smoke which will fill the atmosphere of the planet (like Venus now)
Then it will lose this atmosphere to be without atmosphere (as is the case on Mercury.)
the reason for the rotation of the earth around itself