[Pooya/Ali Commentary 37:5] Mashariq is the plural of mashriq which means east. There are many easts in the universe. The east that we know is not the only east, since the sun rises not only for our planet but many other planets in the solar system. There are several such galaxies in the universe with several suns and their planets and their easts. Also refer to the commentary of Araf: 7. In Rahman: 17, Allah is called the Lord of the two easts and the two wests; and in Ma-arij: 40 He is the Lord of the easts and the wests. So Allah is the Lord of the worlds, the whole universe. His unity, mentioned in verse 4, comprehends every thing that has been created the heavens and the earth, and all between them. Wherever a sun rises in the universe and covers the area with its light is His dominion.