In this contemporary world the protocols that governs the celestial systems are very transparent which states that galaxies are being balanced by the stars and the planets in a clearly described orbits. Which has been distinctly mentioned in Qur’an long long time ago in chapter al-Ambiyaa as,
“(God is) the one who created the night, the day, the sun and the moon. Each one is traveling in an orbit with its own motion.” Qur’an,21:33
An Arabic word that defines this movement is a verb yasbahoon that implicit on motion initiated by a moving body using its own legs on the ground or in water.