Answer: According to the scientists it would take over 400 billion nuclear weapons to produce the same amount of heat that the sun produces in just 1 second, and the sun has been giving this heat for millions of years, and there are millions of suns, one in each universe.
The light of the sun, which illuminates the entire universe, and the light of the moon and fire, all come from Me. (Lord Krishna, Bhagavad-Gita 15.12)
With a single particle of Myself [Krishna], I maintain the entire creation. (Lord Krishna, Bhagavad-Gita 10.42)
Many people say God is great, but they have no idea how great He is. In the above verses, Lord Krishna is stating that He is the maintainer and controller of the sun, and the moon in millions of
universes. Lord Krishna, in His Maha Vishnu expansion, has millions of universes coming out of His body with every exhalation, and with every inhalation, millions of universes go back into His body.
Everything that is opulent, beautiful, and glorious, is created from a spark of My splendor. (Lord Krishna, Bhagavad-Gita 10.41)
From a single spark of Lord Krishna, millions of universes are created. Can you imagine how great Lord Krishna (God) is?