We made the sky a protective ceiling. Yet they are turning away from Our signs!
Translation endnotes
[21:32] If the word sama refers to space, then we should reflect on the force of gravity and counter forces that keep billions of galaxies containing billions of stars and planets in harmonious motion in space. If the word refers to the atmosphere, then we may understand it as the transparent blanket that protects us from extreme heat and cold, a transparent armor that protects us from meteorites, and a transparent filter that protects us from harmful rays. The iron core of the earth works like a dynamo and creates a powerful magnetic field that holds the atmosphere. See 4:82