Introduction
10
na tad bhāsayate sūryo na śaśāṅko na pāvakaḥ vad gatvā na nivartante tad dhāma naramaṁ mama.
“That abode of Mine is not illumined by the sun or moon, nor by electricity. And anyone who reaches it never comes back to this material world.” (Bg. 15.6)
This verse gives a description of that eternal sky. Of course we have a material conception of the sky, and we think of it in relationship to the sun, moon, stars and so on, but in this verse the Lord states that in the eternal sky there is no need for the sun nor for the moon nor fire of any kind because the spiritual sky is already illuminated by the  brahmajyoti , the rays emanating from the Supreme Lord. We are trying with difficulty to reach other planets, but it is not difficult to understand the abode of the Supreme Lord. This abode is referred to as Goloka. In the  Brahma-saṁhitā  it is beautifully described:  Goloka eva nivasaty akhilātma-bhūtaḥ . The Lord resides eternally in His abode Goloka, yet He can be approached from this world, and to this end the Lord comes to manifest His real form,  sac-cidānanda-vigraha . When He manifests this form, there is no need for our imagining what He looks like. To discourage such imaginative speculation, He descends and exhibits Himself as He is, as Śyāmasundara. Unfortunately, the less intelligent deride Him because He comes as one of us and plays with us as a human being. But because of this we should not consider that the Lord is one of us. It is by His potency that He presents Himself in His real form before us and displays His pastimes, which are prototypes of those pastimes found in His abode.
In the effulgent rays of the spiritual sky there are innumerable planets floating. The  brahmajyoti  emanates from the supreme abode, Kṛṣṇaloka, and the  ānandamaya-cinmaya  planets, which are not material, float in those rays. The Lord says,  na tad bhāsayate sūryo na śaśāṅko na pāvakaḥ yad gatvā na nivartante tad dhāma paramaṁ mama . One who can approach that spiritual sky is not required to descend again to the material sky. In the material sky, even if we approach the highest planet (Brahmaloka), what to speak of the moon, we will find the same conditions of life, namely birth, death, disease and old age. No planet in the material universe is free from these four principles of material existence. Therefore the Lord says in  Bhagavad-gītā ,  ābrahma-bhuvanāl lokāḥ punar āvartino 'rjuna . The living entities are traveling from one planet to another, not by mechanical arrangement but by a spiritual process. This is also mentioned:  yānti deva-vratā devān pitṛn yānti pitṛ-vratāḥ . No mechanical arrangement is necessary if we want interplanetary travel. The  Gītā  instructs:  yānti deva-vratā devān . The