And We made the sky a protected ceiling, but they, from its (21:32)

Almuntakhab Fi Tafsir Alquran Alkarim

And We made the heavens with their spheres and regions which resemble a vast vault or canopy overarching and protecting the earth*, being itself protected, maintained, safeguarded and well preserved. Yet they are oblivious of their marvels –stability, regularity, precision, immensity, and what it confers of protection- and fail to ascribe them to their maker Who is Allah

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(21:32) And We made the sky a safe canopy, *33 but in spite of this they do not pay due heed to its signs. *34

And We made the sky a protected ceiling, but they, from its meaning

*33) For explanation, see Al-Hijr (XV): E. N's 8 and 10-12.
*34) That is, "Those signs which are in the sky".
 

And We made the sky a protected ceiling, but they, from its meaning in Urdu

اور ہم نے آسمان کو ایک محفوظ چھت بنا دیا، مگر یہ ہیں کہ اس کی نشانیوں کی طرف توجّہ ہی نہیں کرتے