In the observable Universe 
There are 125 billion galaxies
Where as only 1% is observable and 99% is unoberservable Universe 
The name of our galaxy is Milkyway
There are 100 thousand million stars in our galaxy 
Radius of sun in solar system is 432690 miles
Radius of earth is 3963 miles
Can we imagine how tiny our Earth is and how big this Universe is
But when we compare this Universe with skies then we find that how is every sky bigger and bigger
If we consider this universe is like a balloon and this balloon is wrapped in another balloon which is wrapped in another balloon and so on and so forth
Then according to the information in the Quran
First sky should be ceiling of this universe and second sky should be ceiling of first sky and so on and so forth
“It is Allah who has made for you the earth as a resting place and the sky as a canopy place” -Surah Ghafir 64 Quran

Allah we Akbar

Allah is great