Rāhu, Eclipses, Antarikṣa, and the Seven Subterranean Heavens
Bila-svarga
ततोऽधस्ताच्छतयोजनान्तर इयं पृथिवी यावद्धंसभासश्येनसुपर्णादय: पतत्त्रिप्रवरा उत्पतन्तीति ॥ ६ ॥
tato ’dhastāc chata-yojanāntara iyaṁ pṛthivī yāvad dhaṁsa-bhāsa-śyena-suparṇādayaḥ patattri-pravarā utpatantīti.
Below the abodes of the Yakṣas and Rākṣasas by a distance of 100 yojanas [800 miles] is the planet earth. Its upper limits extend as high as swans, hawks, eagles and similar large birds can fly.
This verse states that the earthly plane (pṛthivī) is situated one hundred yojanas below the previously described region.
Śukadeva uses a familiar natural benchmark—how high great birds can fly—to indicate the extent of the earthly region being described.
It cultivates humility and God-centered perspective by reminding a devotee that the cosmos is vast and systematically governed, encouraging steadiness in bhakti rather than material pride.