Allah says in the Qur’an:

﴿وَالسَّمَاءَ بَنَيْنَاهَا بِأَيْدٍ وَإِنَّا لَمُوسِعُونَ﴾

(Surah Adh-Dhariyat, 51:47)

Translation:

“And the heaven We constructed with strength, and indeed, We are [its] Expander.”

The key word here is “لَمُوسِعُونَ (lamūsiʿūn)”, which implies continuity and ongoing action — meaning the expansion is not a completed event, but a continuing process.

Modern cosmology has shown that the universe is not static; rather, it is constantly expanding, a discovery confirmed in the 20th century through observations such as those of Edwin Hubble.

For people at the time of the Qur’an’s revelation, who largely believed the heavens were fixed and unchanging, this description is remarkably thought-provoking.