Krishna, God, takes us through the "bark" of our galaxy and into the spiritual world, to show us what is there.
Our galaxy "The Milky Way", as indeed all the galaxies of the material cosmos, is divided into three regions either; the planetary system composed of heavenly planets, the intermediate planetary system composed of planets of terrestrial type, and the lower planetary system called "hell" composed of infernal planets. Beyond the higher planetary system, which includes Brahmaloka, the highest planet in the galaxy where Brahma reigns the ruler of our galaxy, are the material envelopes of the galaxy, then beyond the infinite spiritual world, which contains an unlimited number of spiritual planets. These are sources of their own light and they are called Vaikunthalokas; there live, on each of them, the Lord himself and his companions, all eternally liberated.
Mounted on his spiritual chariot with Arjuna, Krishna moves north, passing many planetary systems. Space is likened to an immense ocean enamelled with many planets, and on each of them are also other oceans. On some planets there are oceans of salt water and on others oceans of milk, on others still an ocean of intoxicating liquor or clarified butter or even oil. In the same way, there are different kinds of mountains and each planet also has a type of atmosphere of its own. The outer envelope of each galaxy is composed of layers of water, air, fire, ether, false ego and elements of material nature, and each layer is ten times larger than the previous one.
The universal egg, that is, the galaxy in the form of an egg, corresponds to the manifestation of material energy. The layers of water, air, fire, ether, false ego and the elements of the material nature that cover it are each ten times thicker than the previous one, and the last layer is enveloped by the energy material material in the non-manifested state. Inside this egg is the universal form of Sri Hari (Manifestation of Krishna), which contains as many parts of his body the fourteen planetary systems. The galaxy we inhabit, the outer space we can contemplate with its innumerable planets, has the shape of an egg of which we only see the dense matter, the spiritual and ethereal part is, it, invisible. Just as an egg is covered with a shell, so the galaxy is enveloped by various layers of matter. There is first a layer of water, then a fire, then air, then ether, and finally, the crust that holds all the others. Within this egg-shaped galaxy is the universal form of the Lord, and the different planetary systems represent various parts of his body. For men who are unable to worship directly the spiritual and absolute form of God, it is advisable to meditate on this universal form and to offer it worship. The lowest planetary system, Patala, will then be seen as the sole of the Supreme Lord's feet, the Earth as his belly, and Brahmaloka (the highest of all planetary systems, the one where Brahma lives) as his head.
Galaxies have various dimensions, but all are created on the same principle and krishna, God acts in the same forms. The outer envelope of a galaxy consists of layers