upary adhas ca ye loka
tesam samstham pramanam ca
bhur-lokasya ca varnaya
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O son of Mitra, kindly describe how the planets are situated above the earth as well as underneath it, and also please mention their measurement as well as that of the earthly planets.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Yasmin vijñate sarvam evam vijñatam bhavati (Mundaka Upanisad 1.3). This Vedic hymn declares emphatically that the devotee of the Lord knows everything material and spiritual in relationship with the Lord. Devotees are not simply emotional, as is ill conceived by certain less intelligent men. Their direction is practical. They know everything that is and all the details of the Lord’s domination over the different creations.