ye vÄ u ha tad-ratha-caraṇa-nemi-ká¹›ta-parikhÄtÄs te sapta sindhava Äsan yata eva ká¹›tÄḥ sapta bhuvo dvÄ«pÄḥ
ye - that; vÄ u ha - certainly; tat-ratha - of his chariot; caraṇa - of the wheels; nemi - by the rims; ká¹›ta - made; parikhÄtÄḥ - trenches; te - those; sapta - seven; sindhavaḥ - oceans; Äsan - became; yataḥ - because of which; eva - certainly; ká¹›tÄḥ - were made; sapta - seven; bhuvaḥ - of the BhÅ«-maṇá¸ala; dvÄ«pÄḥ - islands.
Sometimes the planets in outer space are called islands. We have experience of various types of islands in the ocean, and similarly the various planets, divided into fourteen lokas, are islands in the ocean of space. As Priyavrata drove his chariot behind the sun, he created seven different types of oceans and planetary systems, which altogether are known as BhÅ«-maṇá¸ala, or BhÅ«loka. In the GÄyatrÄ« mantra, we chant, om bhÅ«r bhuvaḥ svaḥ tat savitur vareṇyam. Above the BhÅ«loka planetary system is Bhuvarloka, and above that is Svargaloka, the heavenly planetary system. All these planetary systems are controlled by SavitÄ, the sun-god. By chanting the GÄyatrÄ« mantra just after rising early in the morning, one worships the sun-god.