There are two possibilities
According to the researchers, the difference in rotational directions suggests that the universe has been spinning since the time of its existence. It may have inherited its spin from a black hole inside which it resides.
“One explanation is that the universe was born rotating. That explanation agrees with theories such as black hole cosmology, which postulates that the entire universe is the interior of a black hole. But if the universe was indeed born rotating, it means that the existing theories about the cosmos are incomplete.” Shamir said.
However, there’s another factor that could be at play here. When an object moves away or towards you, there’s a change in the frequency of sound or light emitted by the object. This phenomenon is called the Doppler shift.