what is un-Islamic about it!
Quran says
"Allah is the one who created seven heavens and from Earth like them (of corresponding type); [Allah’s] command descends among them (heavens and earths) so that you may know that Allah is capable of anything and that Allah knows everything. " (65.12)
Do not the unbelievers see that the heavens and the earth were joined together (as one unit of creation), before We cleaved them asunder? We made from water every living thing. Will they not then believe?}* (Al-Anbiyaa’ 21:30) (big-bang theory)
Among His signs is the creation of the heavens and the earth, and the living creatures that He has scattered through them: and He has power to gather them together when He wills. (Ash-Shura 42:29)