Now, according to our calculation, the sun is a planet which is too hot, and nobody can go there. And actually, so far our this present body is concerned, it is not possible to, I mean to tolerate even the sunshine from a distance of ninety-three hundred millions or ninety's . . . I could not exactly . . . it is far distant place. But actually, from the description of Vedic literature, we can understand that sun planet is just like a planet like this, but it is made of fire. It is made of fire.
Just like this planet is predominant by earth only, similarly, there are varieties of planet in the universe. Some planet is predominant by air; some planet is predominant by water; some planet is predominant by fire. So similarly, the sun planet is predominant by fire. There are living entities also, and there is one principal living entity who is called the sun-god, Sūrya Nārāyaṇa. Or, in the language of the Bhagavad-gītā, he is called Vivasvān. In the language of Bhagavad-gītā.
Just like in every planet there is a chief man—just like in your country, the chief man is President Johnson—similarly, in every planet there is a chief man. Formerly, in this planet also there was one king. We can get from Mahābhārata history that five thousand years before, there was only one king of this planet, one flag and one regiment. We get this information from Mahābhārata. Gradually, the world has divided into many states, and we can see hundreds of flags in the United States, nations. But similarly, the example is that similarly, that in the sun planet there is a chief person who is called Vivasvān. Who is called Vivasvān.
So Lord Kṛṣṇa says that, "This science of karma-yoga, what I am just trying to explain to you, it is not a new thing, but first I spoke this karma-yoga to Vivasvān." Vivasvān means the sun-god.