Question

He said ,"the earth moves around the sun" change into indirect speech

Answer 1

He said that the earth moves around the sun.

there is no change in reported speech bcoz this is an universal truth.

hope it helps.

Answer 2

Given sentence: He said that the earth moves around the sun.

Indirect Speech: He said that the earth moves around the sun.

There is no change in reported speech because the given sentence is the example of universal truth.

Another example of universal truth are: Sun rises from east, Sun sets in West and so on.