The word garuda in this verse indicates that there are planets of great birds like Garuda. Similarly, the word uraga indicates that there are planets of enormous serpents. Such a description of the various planets of the universe may challenge modern scientists who think that all planets but this earth are vacant. These scientists claim to have launched excursions to the moon, where they have found no living entities but only big craters full of dust and stone, although in fact the moon is so brilliant that it acts like the sun in illuminating the entire universe. Of course, it is not possible to convince modern scientists of the Vedic information about the universe. Nonetheless, we are not very much impressed by the words of scientists who say that all other planets are vacant and that only the earth is full of living entities.