Krsna is the Supreme Personality of Godhead and cause of all causes.

This includes Krsna being the source of all Narayana/Visnu expansions of God, who all originated (expanded) from Krsna in Goloka-Vrindavana.

Each Visnu/Narayana Form further have their own perpetual Vaikuntha planet where they reside as a four armed Form whose Vaikuntha planets surround Krsna's central Abode of Goloka-Vrindavana. 

Together the the Vaikuntha planets and Goloka-Vrindavana take up 75% of the Spiritual Sky where everything there is living as individual forms, lifeless material energy or Maya does not exist there in the Vaikuntha planets or Goloka-Vrindavana.  

The other 25% of the Spiritual Sky is the temporary (decomposing) material world of repeated birth and death created and maintained by Krsna's expansion's 

1 - Karanarnavasayi Visnu (Maha-Visnu), who creates all the unlimited massive Brahmanda universes. 

2 - Garbhodakashayi Visnu (Hiraņyagarbha) who creates a "secondary material universe" inside the massive surrounding Brahmanda universe.

3 - Ksirodakasayi Visnu (Paramatma) who resides next to every marginal living entity (jiva-soul) within what ever material bodily vessel they take out of the 8 million 400 species of material life.

There is only one Maha-Visnu, but unlimited Garbhodakashayi Visnus and Ksirodakasayi Visnus.

This is because of the unlimited number of "secondary universes" there are, that are each deep within their massive Brahmanda universe.

Krsna is the original source of Maha-Visnu who creates these material universes (Brahmandas) that originate from Maha-Visnu's breathing and the pores of His skin as seen in photo below.

As said above, deep inside each Brahmanda material universe, there is a "secondary inner" enclosed universe where Maha-Visnu expands as Garbhodakashayi Visnu, from whom Lord Brahma appears at the top of a lotus flower growing from the naval of Garbhodakashayi Visnu and builds the many planetary systems in his material universe. 

There are unlimited Brahmanda universes, each having a secondary material universe inside of them meaning each has their own Garbhodakashayi Visnu and Lord Brahma.

In these "secondary material universes" created by Garbhodakashayi Visnu within each Brahmanda universe, Lord Brahma builds the planetary systems.

In our secondary material universe, there are 14 planetary systems.

In other material universes inside their Brahmanda, they have many more planetary systems than just 14.

Our materiala universe is one of the smallest.

The size of each Brahmanda and inner universe depends on how many heads Lord Brahma has, in our material universe he has four heads, while in other material universes Brahma may have 10, 20, 50, 100, 100,000, one million or 10 million. The workings of this material universe is beyond our comprehension.×. ×.