The Power of Allah and His Signs in the Heavens and on Earth
To those who ponder, and look repeatedly at the dazzling signs and wonders that are to be seen in the creation, Allah mentions His creation of the heavens, with their immense height, and both the fixed and moving heavenly bodies with which He has adorned it. Here, Mujahid and Qatadah said that Buruj big stars refers to the heavenly bodies. (I say): This is like the Ayah :
تَبَارَكَ الَّذِى جَعَلَ فِى السَّمَآءِ بُرُوجاً
(Blessed be He Who has placed the big stars in the heavens.) 25:61 `Atiyah Al-`Awfi said: "Buruj here refers to sentinel fortresses." He made the "shooting stars" to guard it against the evil devils who try to listen to information conveyed at the highest heights. If any devil breaches it and advances hoping to listen, a clear "shooting star" comes to him and destroys him. He may already have passed on whatever he heard before the fire hit him, to another devil below him; the latter will then take it to his friends among humans, as is stated in the Sahih. Explaining this Ayah, Al-Bukhari reported from Abu Hurayrah that the Prophet said:
Mentioned in the previous verses was the doggedness and hostility of deniers and disbelievers. In the present verse, and in those which follow immediately after, clear proofs of the Oneness, Knowledge and Power of Allah Ta’ ala have been given. Described alongside is what transpires before His creation between the heavens and the earth, a little deliberation in which on the part of a sensible person would make any denial impossible.
Commentary
The word: بُرُوجًا ; is the plural of: بُرُج (burj) which is applied to big palaces and castles and to similar other structural entities. Tafsir authorities Mujahid, Qatadah, Abu Salih and others have explained 'buruj' at this place in the sense of big stars. As for the statement in this verse which points to the creation of these big stars in the sky, the word: السَّمَاءِ (as-sama’) sky means atmosphere which, in common modern day terminology, is called the 'space.' The application of 'as-sama" in both these senses is common, and recognized. Thus, the physical presence of deep space is identified as 'as-sama" and the atmosphere much lower than it has also been repeatedly termed as 'as-sama" in the Holy Qur'an. As for the planets and stars being in the space, and not in the skies, the relevant investigative details, as coordinated with the verses of the Qur’ an and classical and modern astronomy, will Insh’ Allah appear under our comments on the verse: تَبَارَكَ الَّذِي جَعَلَ فِي السَّمَاءِ بُرُوجًا وَجَعَلَ فِيهَا سِرَاجًا وَقَمَرًا مُّنِيرًا (Blessed is He Who made in the sky stellar formations and made in it the Sun and the Moon providing light) of Surah Al-Furqan (25 :61).
This does not refer simply to the wonderful appearance of the sky at night. There are innumerable stars spread out in the universe, grouped in clusters, called constellations. Our own constellation is called the ‘Milky Way.’ During the night, when the atmosphere is free of clouds, dust, etc., when one stands on open ground and casts a glance at the sky, the array of twinkling stars in the vastness of the heavens is so wonderfully glorious that, on seeing it, man becomes overwhelmed by the feeling of God’s greatness and majesty. Those who used to tell the Prophet he should show an angel descending from heaven were asked, ‘Is the scene of the stars in the sky shown to you every day not enough to awaken your consciousness and is it not enough to melt your hearts? Must you then demand further miracles?’
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.