In the effulgent rays of the spiritual sky there are innumerable planets floating. The brahma-jyotir emanates from the supreme abode, Kṛṣṇaloka, and the ānanda-maya, cin-maya 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 (BG 15.6). 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.