The Earth was created before Heaven

Aѕѕαℓααмυαℓαιкυм ωαяαнмαтυllαнι ωαвαяαкαтυнυ ツ
The Earth was created before Heaven
Quran & Tafseer Al Quran

Mujahid commented on Allah's statement,

﴿هُوَ الَّذِى خَلَقَ لَكُم مَّا فِى الْأَرْضِ جَمِيعاً﴾
(He it is Who created for you all that is on earth) "Allah created the earth before heaven, and when He created the earth, smoke burst out of it. This is why Allah said,

﴿ثُمَّ اسْتَوَى إِلَى السَّمَآءِ وَهِىَ دُخَانٌ﴾
(Then He Istawa ila (turned towards) the heaven when it was smoke.) (41:11)

﴿فَسَوَّاهُنَّ سَبْعَ سَمَـوَاتٍ﴾
(And made them seven heavens) means, one above the other, while the `seven earths' means, one below the other.''

This Ayah testifies to the fact that the earth was created before heaven, as Allah has indicated in the Ayat in Surat As-Sajdah.

Spreading the Earth out after the Heavens were created:

Sahih Al-Bukhari records that when Ibn `Abbas was question about this matter, he said that the earth was created before heaven, and the earth was spread out only after the creation of the heaven. Several Tafsir scholars of old and recent times also said similarly, as we have elaborated on in the Tafsir of Surat An-Nazi`at (chapter 79). The result of that discussion is that the word Daha (translated above as "spread'') is mentioned and explained in Allah's statement,

﴿وَالْأَرْضَ بَعْدَ ذَلِكَ دَحَـهَا - أَخْرَجَ مِنْهَا مَآءَهَا وَمَرْعَـهَا - وَالْجِبَالَ أَرْسَـهَا ﴾
(And the earth, after that, He spread it out. And brought forth therefrom its water and its pasture. And the mountains He has fixed firmly.) (79:30-32)

Therefore, Daha means that the earth's treasures were brought to its surface after finishing the job of creating whatever will reside on earth and heaven. When the earth became Daha, the water burst out to its surface and the various types, colors, shapes and kinds of plants grew. The stars started rotating along with the planets that rotate around them. And Allah knows best.