We hear from the Bhagavad-gītā the duration of life of Brahmā, sahasra-yuga-paryantam ahar yad brahmaṇo viduḥ (BG 8.17). Our some millions of years is equal to twelve hours of Brahmā.
So in this way, if you like to go to the other, higher planetary system, there is system how to go there. As we have got system here in this world. . . If anyone wants to come to America, he has to arrange for visa and passport and so many things. Without going through the system, you cannot enter by force. So these foolish people are thinking that "There is no living entity. It is lying vacant, and by force we can go there." And after spending millions of dollars, we come back with some dust, that's all. (laughter) And become proud that we have gone to moon planet. So the Vedic śāstra does not say so. But you can go there. You can live there, a higher standard of comfortable life, higher duration of life. Yānti deva-vratā devān (BG 9.25). You can go there. But anywhere you go within this material world, either the moon planet or sun planet or Brahmaloka, Kṛṣṇa says, ābrahma-bhuvanāl lokāḥ punar āvartino 'rjuna (BG 8.16). Even if you go to the Brahmaloka, that is also not permanent settlement. After many, many years, you have to come. . . Kṣīṇe puṇye punaḥ martya-lokaṁ viśanti (BG 9.21). When your resultant action of pious life will be finished, you will come back again.