We can only say that's the Fabric Of Creation, littered with other worlds.
Suddenly, Orot Gvohim came from nowhere, known as the higher light in the sky. There was a huge amount of blue light. And boom!

Altar Of Wisdom was created... From time to time, far Beyond The Darklight, two travelers could be seen, flying with an enormous speed To Sirius.

There, they made their Transcendence...
Today, they are everywhere.
In the air, in the light, in the music, all around us like Radioactive Atoms.

They're known as Cosmic Dimension.