In this verse it is stated that the planetary system known as Bhū-maṇḍala extends to the limits of the sunshine. According to modern science, the sunshine reaches earth from a distance of 93,000,000 miles. If we calculate according to this modern information, 93,000,000 miles can be considered the radius of Bhū-maṇḍala. In the Gāyatrī mantra, we chant om bhūr bhuvaḥ svaḥ. The word bhūr refers to Bhū-maṇḍala. Tat savitur vareṇyam: the sunshine spreads throughout Bhū-maṇḍala. Therefore the sun is worshipable. The stars, which are known as nakṣatra, are not different suns, as modern astronomers suppose. From Bhagavad-gītā (10.21) we understand that the stars are similar to the moon (nakṣatrāṇām ahaṁ śaśī). Like the moon, the stars reflect the sunshine. Apart from our modern distinguished estimations of where the planetary systems are located, we can understand that the sky and its various planets were studied long, long before Śrīmad-Bhāgavatam was compiled. Śukadeva Gosvāmī explained the location of the planets, and this indicates that the information was known long, long before Śukadeva Gosvāmī related it to Mahārāja Parīkṣit. The location of the various planetary systems was not unknown to the sages who flourished in the Vedic age.

Mahārāja Parīkṣit had already been advised by his spiritual master, Śukadeva Gosvāmī, to think of the universal form of the Lord, and therefore, following the advice of his spiritual master, he continuously thought of that form. The universal form is certainly material, but because everything is an expansion of the energy of the Supreme Personality of Godhead, ultimately nothing is material. Therefore Parīkṣit Mahārāja’s mind was saturated with spiritual consciousness. Śrīla Rūpa Gosvāmī has stated:

Everything, even that which is material, is connected with the Supreme Personality of Godhead. Therefore everything should be engaged in the service of the Lord. Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura translates this verse as follows:

“One should not give up anything connected with the Supreme Personality of Godhead, thinking it material or enjoyable for the material senses.” Even the senses, when purified, are spiritual. When Mahārāja Parīkṣit was thinking of the universal form of the Lord, his mind was certainly situated on the transcendental platform. Therefore although he might not have had any reason to be concerned with detailed information of the universe, he was thinking of it in relationship with the Supreme Lord, and therefore such geographical knowledge was not material but transcendental. Elsewhere in Śrīmad-Bhāgavatam (1.5.20) Nārada Muni has said, idaṁ hi viśvaṁ bhagavān ivetaraḥ: the entire universe is also the Supreme Personality of Godhead, although it appears different from Him. Therefore although Parīkṣit Mahārāja had no need for geographical knowledge of this universe, that knowledge was also spiritual and transcendental because he was thinking of the entire universe as an expansion of the energy of the Lord.

In our preaching work also, we deal with so much property and money and so many books bought and sold, but because these dealings all pertain to the Kṛṣṇa consciousness movement, they should never be considered material. That one is absorbed in thoughts of such management does not mean that he is outside of Kṛṣṇa consciousness. If one rigidly observes the regulative principle of chanting sixteen rounds of the mahā-mantra every day, his dealings with the material world for the sake of spreading the Kṛṣṇa consciousness movement are not different from the spiritual cultivation of Kṛṣṇa consciousness.

The material world is only one fourth of the Supreme Personality of Godhead’s creation, but it is unlimited and impossible for anyone to know or describe, even with the qualification of a life as long as that of Brahmā, who lives for millions and millions of years. Modern scientists and astronomers try to explain the cosmic situation and the vastness of space, and some of them believe that all the glittering stars are different suns. From Bhagavad-gītā, however, we understand that all these stars (nakṣatras) are like the moon, in that they reflect the sunshine. They are not independent luminaries. Bhūloka is explained to be that portion of outer space through which the heat and light of the sun extend. Therefore it is natural to conclude that this universe extends in space as far as we can see and encompasses the glittering stars. Śrīla Śukadeva Gosvāmī admitted that to give full details of this expansive material universe would be impossible, but nevertheless he wanted to give the King as much knowledge as he had received through the paramparā system. We should conclude that if one cannot comprehend the material expansions of the Supreme Personality of Godhead, one certainly cannot estimate the expansiveness of the spiritual world. The Brahma-saṁhitā (5.33) confirms this:

The limits of the expansions of Govinda, the Supreme Personality of Godhead, cannot be estimated by anyone, even a person as perfect as Brahmā, not to speak of tiny scientists whose senses and instruments are all imperfect and who cannot give us information of even this one universe. We should therefore be satisfied with the information obtainable from Vedic sources as spoken by authorities like Śukadeva Gosvāmī.

Śrīla Viśvanātha Cakravartī Ṭhākura gives the following quotation from the Vāyu Purāṇa, wherein the locations of the various mountains, beginning with the Himālayas, are described.

dhanurvat saṁsthite jñeye dve varṣe dakṣiṇottare; dīrghāṇi tatra catvāri caturasram ilāvṛtam iti dakṣiṇottare bhāratottara-kuru-varṣe catvāri kiṁpuruṣa-harivarṣa-ramyaka-hiraṇmayāni varṣāṇi nīla-niṣadhayos tiraścinībhūya samudra-praviṣṭayoḥ saṁlagnatvam aṅgīkṛtya bhadrāśva-ketumālayor api dhanur-ākṛtitvam; atas tayor dairghyata eva madhye saṅkucitatvena nava-sahasrāyāmatvam; ilāvṛtasya tu meroḥ sakāśāt catur-dikṣu nava-sahasrāyāmatvaṁ saṁbhavet vastutas tv ilāvṛta-bhadrāśva-ketumālānāṁ catus-triṁśat-sahasrāyāmatvaṁ jñeyam.

In this regard, Madhvācārya quotes the following verses from the Brahmāṇḍa Purāṇa:

It appears from these verses that aside from the sun and moon, there is an invisible planet called Rāhu. The movements of Rāhu cause both solar and lunar eclipses. We suggest that the modern expeditions attempting to reach the moon are mistakenly going to Rāhu.

There are so many mountains, even on this planet earth. We do not think that the measurements of all of them have actually been calculated. While passing over the mountainous region from Mexico to Caracas, we actually saw so many mountains that we doubt whether their height, length and breadth have been properly measured. Therefore, as indicated in Śrīmad-Bhāgavatam by Śukadeva Gosvāmī, we should not try to comprehend the greater mountainous areas of the universe merely by our calculations. Śukadeva Gosvāmī has already stated that such calculations would be very difficult even if one had a duration of life like that of Brahmā. We should simply be satisfied with the statements of authorities like Śukadeva Gosvāmī and appreciate how the entire cosmic manifestation has been made possible by the external energy of the Supreme Personality of Godhead. The measurements given herein, such as 10,000 yojanas or 100,000 yojanas, should be considered correct because they have been given by Śukadeva Gosvāmī. Our experimental knowledge can neither verify nor disprove the statements of Śrīmad-Bhāgavatam. We should simply hear these statements from the authorities. If we can appreciate the extensive energy of the Supreme Personality of Godhead, that will benefit us.

In the Vāyu Purāṇa there is also a reference to this tree by great learned sages:

We can only imagine how much juice there might be in a fruit that is the size of an elephant but has a very tiny seed. Naturally the juice from the broken jambū fruits forms waterfalls and floods the entire land of Ilāvṛta. That juice produces an immense quantity of gold, as will be explained in the next verses.

By the arrangement of the Supreme Personality of Godhead, the rivers on some planets produce gold on their banks. The poor inhabitants of this earth, because of their incomplete knowledge, are captivated by a so-called bhagavān who can produce a small quantity of gold. However, it is understood that in a higher planetary system in this material world, the mud on the banks of the Jambū-nadī mixes with jambū juice, reacts with the sunshine in the air, and automatically produces huge quantities of gold. Thus the men and women are decorated there by various golden ornaments, and they look very nice. Unfortunately, on earth there is such a scarcity of gold that the governments of the world try to keep it in reserve and issue paper currency. Because that currency is not backed up by gold, the paper they distribute as money is worthless, but nevertheless the people on earth are very proud of material advancement. In modern times, girls and ladies have ornaments made of plastic instead of gold, and plastic utensils are used instead of golden ones, yet people are very proud of their material wealth. Therefore the people of this age are described as mandāḥ sumanda-matayo manda-bhāgyā hy upadrutāḥ (Bhāg. 1.1.10). In other words, they are extremely bad and slow to understand the opulence of the Supreme Personality of Godhead. They have been described as sumanda-matayaḥ because their conceptions are so crippled that they accept a bluffer who produces a little gold to be God. Because they have no gold in their possession, they are actually poverty-stricken, and therefore they are considered unfortunate.

Sometimes these unfortunate people want to be promoted to the heavenly planets to achieve fortunate positions, as described in this verse, but pure devotees of the Lord are not at all interested in such opulence. Indeed, devotees sometimes compare the color of gold to that of bright golden stool. Śrī Caitanya Mahāprabhu has instructed devotees not to be allured by golden ornaments and beautifully decorated women. Na dhanaṁ na janaṁ na sundarīm: a devotee should not be allured by gold, beautiful women or the prestige of having many followers. Śrī Caitanya Mahāprabhu, therefore, confidentially prayed, mama janmani janmanīśvare bhavatād bhaktir ahaitukī tvayi: “My Lord, please bless Me with Your devotional service. I do not want anything else.” A devotee may pray to be delivered from this material world. That is his only aspiration.

The humble devotee simply prays to the Lord, “Kindly pick me up from the material world, which is full of varieties of material opulence, and keep me under the shelter of Your lotus feet.”

Śrīla Narottama dāsa Ṭhākura prays:

“O my Lord, O son of Nanda Mahārāja, now You are standing before me with Your consort, the daughter of Vṛṣabhānu, Śrīmatī Rādhārāṇī. Kindly accept me as the dust of Your lotus feet. Please do not kick me away, for I have no other shelter.”

Similarly, Prabodhānanda Sarasvatī indicates that the position of the demigods, who are decorated with golden helmets and other ornaments, is no better than a phantasmagoria (tri-daśa-pūr ākāśa-puṣpāyate). A devotee is never allured by such opulences. He simply aspires to become the dust of the lotus feet of the Lord.

The distance between one hand and another when one spreads both his arms is called a vyāma. This comes to about eight feet. Thus each of the rivers was about forty feet wide, making a total of about two hundred feet.

The prosperity of humanity does not depend on a demoniac civilization that has no culture and no knowledge but has only gigantic skyscrapers and huge automobiles always rushing down the highways. The products of nature are sufficient. When there is a profuse supply of milk, yogurt, honey, food grains, ghee, molasses, dhotis, saris, bedding, sitting places and ornaments, the residents are actually opulent. When a profuse supply of water from the river inundates the land, all these things can be produced, and there will not be scarcity. This all depends, however, on the performance of sacrifice as described in the Vedic literature.

“All living bodies subsist on food grains, which are produced from rains. Rains are produced by performance of yajña [sacrifice], and yajña is born of prescribed duties.” These are the prescriptions given in Bhagavad-gītā (3.14). If people follow these principles in full Kṛṣṇa consciousness, human society will be prosperous, and they will be happy both in this life and in the next.

This verse hints at the perfection of human society even within this material world. The miserable conditions of this material world can be corrected by a sufficient supply of milk, yogurt, honey, ghee, molasses, food grains, ornaments, bedding, sitting places and so on. This is human civilization. Ample food grains can be produced through agricultural enterprises, and profuse supplies of milk, yogurt and ghee can be arranged through cow protection. Abundant honey can be obtained if the forests are protected. Unfortunately, in modern civilization, men are busy killing the cows that are the source of yogurt, milk and ghee, they are cutting down all the trees that supply honey, and they are opening factories to manufacture nuts, bolts, automobiles and wine instead of engaging in agriculture. How can the people be happy? They must suffer from all the misery of materialism. Their bodies become wrinkled and gradually deteriorate until they become almost like dwarves, and a bad odor emanates from their bodies because of unclean perspiration resulting from eating all kinds of nasty things. This is not human civilization. If people actually want happiness in this life and want to prepare for the best in the next life, they must adopt a Vedic civilization. In a Vedic civilization, there is a full supply of all the necessities mentioned above.

Śrīla Viśvanātha Cakravartī Ṭhākura confirms that the townships of Lord Brahmā and the eight subordinate governors of the planetary systems, beginning with Indra, are mentioned in other Purāṇas.

Brahmā’s township is known as Manovatī, and those of his assistants such as Indra and Agni are known as Amarāvatī, Tejovatī, Saṁyamanī, Kṛṣṇāṅganā, Śraddhāvatī, Gandhavatī, Mahodayā and Yaśovatī. Brahmapurī is situated in the middle, and the other eight purīs surround it in all directions.