It is said in the śāstra that if you go to the moon planet, then you live there for ten thousands of years. Ten thousand of years. And their calculation of time is also greater than ours. It is calculated that our six months is equal to their one day. That is called deva calculation. In this way you can get very long duration of life, very comforts, and nice, beautiful body and residential quarters. Everything is very, very nice. Each higher planetary system is better than the other, better than the other. This way you can go to the Brahmaloka. Brahmaloka mean where the topmost planet. They have calculated, the modern astronomers and the planet-goers, that it takes about forty thousands of years to go to the topmost planet of this universe. So these things are there.
Anyway, in the Bhagavad-gītā it is said that even if you go to the topmost planet, there is also birth, death, old age and disease. You cannot avoid this. So long you shall remain within this material world, you have to accept these four principles of material condition, that you'll have to die. Either you live for ten thousands of years or ten millions of years, it doesn't matter; you have to die. Even Brahmā dies, who has got many millions of years. It is stated in the Bhagavad-gītā, Brahmā's one day, daytime duration, which is calculated, our twelve hours. There are twelve hours day, twelve hours night. That is twenty-four hours. So Brahmā's one daytime duration, twelve hours ours, is calculated to be forty three hundred thousands of years multiplied by one thousand. Now calculate what is the . . . That is forty three hundred thousands of years.