The Quranic reference to outer space/universe occurs by means of the following words/phrases
A- heaven/sky (samaa) -depending on the context
B- 7 heavens/7 skies (saba sama waat) – depending on the context
C- lowest heaven (samaa ad dunya)
D- 7 strong (saba an shidada)
E- 7 paths (saba taraaiq)
A -Quran 15 16
وَلَقَدْ جَعَلْنَا فِى ٱلسَّمَآءِ بُرُوجًۭا وَزَيَّنَّـٰهَا لِلنَّـٰظِرِينَ ١٦
Indeed, We have placed constellations in the sky and adorned it for all to see.
B- Quran 17 44
تُسَبِّحُ لَهُ ٱلسَّمَـٰوَٰتُ ٱلسَّبْعُ وَٱلْأَرْضُ وَمَن فِيهِنَّ ۚ وَإِن مِّن شَىْءٍ إِلَّا يُسَبِّحُ بِحَمْدِهِۦ وَلَـٰكِن لَّا تَفْقَهُونَ تَسْبِيحَهُمْ ۗ إِنَّهُۥ كَانَ حَلِيمًا غَفُورًۭا ٤٤
The seven heavens , the earth and all those in them glorify Him. There is not a single thing that does not glorify His praises—but you ˹simply˺ cannot comprehend their glorification. He is indeed Most Forbearing, All-Forgiving.
C-Quran 41 12
فَقَضَىٰهُنَّ سَبْعَ سَمَـٰوَاتٍۢ فِى يَوْمَيْنِ وَأَوْحَىٰ فِى كُلِّ سَمَآءٍ أَمْرَهَا ۚ وَزَيَّنَّا ٱلسَّمَآءَ ٱلدُّنْيَا بِمَصَـٰبِيحَ وَحِفْظًۭا ۚ ذَٰلِكَ تَقْدِيرُ ٱلْعَزِيزِ ٱلْعَلِيمِ ١٢
So He formed the heaven into seven heavens in two Days, assigning to each its mandate. And We adorned the lowest heaven with ˹stars like˺ lamps ˹for beauty˺ and for protection. That is the design of the Almighty, All-Knowing.
D -Quran 78 12
وَبَنَيْنَا فَوْقَكُمْ سَبْعًۭا شِدَادًۭا ١٢
and built above you seven strong (heavens)
E- Quran 23 17
وَلَقَدْ خَلَقْنَا فَوْقَكُمْ سَبْعَ طَرَآئِقَ وَمَا كُنَّا عَنِ الْخَلْقِ غَـفِلِينَ
And indeed We have created above you seven taraaiq(seven paths)and We are never unaware of the creation.
Allah SWT and His Prophet SAW know best