The duration of the material universe is limited. It manifests itself in cycles of kalpas. Each kalpa is a day of the life of Brahma, the demiurge, and in a thousand cycles of four ages or yugas: satya-yuga, the Treta Yuga, the Dvapara-yuga and Kali-yuga. The Satya Yuga, or the Golden Age, where reign of virtue, wisdom and spirituality, without a trace of ignorance or vice lasts 1,728,000 years. The Treta Yuga, or the Silver Age, which begins to appear Vice lasts 1,296,000 years. The Dvapara Yuga, or the Bronze Age, during which the virtue and spirituality still declining while vice grows, lasts 864,000 years. And Kali Yuga or the Iron Age (started from 5000), who sees the conflicts abound, ignorance, irreligion and vice, true virtue which is virtually gone, lasts 432,000 years. In this age, immorality increases to the point that its end, the Supreme Lord appears in person, as the incarnation of Kalki, to defeat the demons, save His devotees, and inaugurate a new satya- yuga. Then the cycle starts again. These four yugas repeated a thousand times form a day in the life of Brahma, the creator angel, and each of his nights as hard. Brahma lives one hundred years, which therefore correspond to 311 billion 40 billion (311 040 000 000 000) of our earthly years, then dies. However, this wonderful life, for us almost infinite, is only a brief flash in the stream of eternity. Causal Ocean contains innumerable Brahmas, appearing and disappearing like bubbles in the Atlantic. Belonging to the material world, as their respective world, they are in constant becoming.
No one in the material universe not even Brahma, can escape birth, old age, illness or death. Brahma, however, because it serves the Supreme Lord directly in governing the universe, has since liberation. It was on his planet, Brahmaloka, which is also the most advanced planet in the universe and which survives even to the heavenly places of the upper planetary system, as will advanced sannyasis; but by the laws of material nature, neither Brahma nor the inhabitants of Brahmaloka not escape death.
The excellences of Krishna
Krishna is the original name of God, the Supreme Being, in his first spiritual form and means "Endlessly Fascinating." All Krishna Entertainment resemble the activities of humans. So understand that His form is like that of man. In truth, the human form only imitating His.
Gokula, and remains supreme planet, like a thousand-petalled lotus. The Heart of that lotus is the abode of Krishna. The Supreme remains in the shape of lotus is created by the will of the Lord.