272
Śrīmad-Bhāgavatam
[Canto 5, Ch. 20]
The sixth island, Puṣkaradvīpa, which is twice as wide as the previous island, is surrounded by an ocean of clear water. Its master is Vītihotra, another son of Mahārāja Priyavrata. The island is divided in two by a large mountain named Mānasottara. The inhabitants of this island worship Svayambhū, another feature of the Supreme Personality of Godhead. Beyond Puṣkaradvīpa there are two islands, one always lit by the sunshine and the other always dark. Between them is a mountain called Lokāloka, which is situated one billion miles from the edge of the universe. Lord Nārāyaṇa, expanding His opulence, resides upon this mountain. The area beyond Lokāloka Mountain is called Aloka-varṣa, and beyond Aloka-varṣa is the pure destination of persons who desire liberation.
Vertically, the sun-globe is situated just in the middle of the universe, in Antarikṣa, the space between Bhūrloka and Bhuvarloka. The distance between the sun and the circumference of Aṇḍa-golaka, the globe of the universe, is estimated to be twenty-five  koṭi yojanas  (two billion miles). Because the sun enters the universe and divides the sky, it is known as Mārtaṇḍa, and because it is produced from Hiraṇyagarbha, the body of the  mahat-tattva , it is also called Hiraṇyagarbha.
TEXT I
श्रीशुक उवाच
अतः परं प्रक्षादीनां ग्रमाणत्प्रक्षणसंस्थानतो वर्षविभाग उपवर्ण्यते ॥ १ ॥
śrī-śuka uvāca
ataḥ param plakṣādīnām pramāṇa-lakṣaṇa-saṁsthānato varṣa-vibhāga upavarṇyate.
śrī-śukaḥ uvāca—Śukadeva Gosvāmī said;  ataḥ param —after this;  plakṣa-ādīnām —of the island named Plakṣa and others;  pramāṇa-lakṣaṇa-saṁsthānataḥ —from the angle of dimensions, particular characteristics and form;  varṣa-vibhāgaḥ —the division of the island;  upavarṇyate —is described.