The Lord is the creator of the entire material cosmos in which float millions of galaxies that the Indian sacred texts call “universe”. Each galaxy is ruled by a Brahma, who rules under the authority of God.
After receiving knowledge from God, the Supreme person, and following a very long period of austerity, Brahma, the demiurge, the first created, the ancestor of human beings and ruler of our galaxy, is empowered and placed in this position by Krishna, God, the Supreme Lord. He therefore acts as the second creator, creates the galaxy “The Milky Way”, and asks the ancestors of mankind to generate offspring on each planet. Brahma lives on his own planet, Brahmaloka, the highest planet in our galaxy.
In reality, a day of Brahma who lives much longer than us human beings on earth, i.e. twelve hours, is equivalent to a thousand cycles of four ages; the Satya or the Golden Age, the Treta or the Silver Age, the Dvapara or the Copper Age and the Kali or the Iron Age. Each cycle lasts for 4,320,000,000 of our earth years. We are now living in the Iron Age, which lasts 432,000 years, and only 5,000 years have passed. Preceded this last age, the copper age which lasts 864,000 years, the silver age which lasts 1,296,000 years, and the golden age, the age of truth, which lasts 1,728,000 years. A night of equal duration follows the day.
There are thirty days in a month, and twelve months in a year. As Brahma lives one hundred years, his longevity according to our calculations is therefore 4,320,000,000 x 1,000 x 2 x 30 x 12 x 100 = 311,040,000,000,000 earth years.
Brahma therefore lives one hundred (100) years, which corresponds to 311 trillion 40 billion [311,040,000,000,000] of our earth years, then dies. This extraordinary longevity, which just seems almost infinite to us, is but a brief flash in the flow of eternity.
If Brahma's life seems very long to us compared to ours, then what will insects say like the ephemeral that lives its hundred years in the space of a single day.
The final annihilation of the galaxy is not for tomorrow.
In reality, the duration of the existence of the galaxy corresponds to the lifespan of Brahma. However, Brahma is now in the middle of his life, or about fifty (50) years. So he still has 155,520,000,000,000 years [155 trillion 520 billion] to live.
It will be the same for our galaxy, for which the final annihilation or final annihilation will therefore not occur before 155,520 million years. It is therefore a considerable number of years before our galaxy is completely destroyed. These billions of years are truly a flash of eternity. We still have a lot of time ahead of us.
When Brahma dies, his planet, Brahmaloka, is destroyed. Life on this supreme planet of our galaxy seems incredibly long compared to life on earth, but it is fast compared to eternal life. When Brahma dies, whatever galaxy is wiped out, and will reappear several million years later, i.e. after a period equivalent to that of its existence.