One yojana is calculated to be eight miles
SB Canto 3
SB Canto 5
Pradyumna: Translation: "Vidura, while on pilgrimage, left his body at Prabhāsa. Because he was absorbed in thought of Lord Kṛṣṇa, he was received by the denizens of Pitṛloka, where he returned to his original post." [SB 1.15.49]Prabhupāda: This Vidura was Yamarāja. So he was cursed by one muni to go down and take birth in śūdra family. Yamarāja was very exalted post, but still... Yamarāja means the superintendent of death. There is Pitṛloka, Yamaloka, different planets. And where each planet is situated, how many miles, yojana... The Sanskrit is called yojana. Yojana means eight miles. So how many yojana is one planet situated from another planet, that is all described in the Bhāgavata, Fifth Canto.
Conversations and Morning Walks
1975 Conversations and Morning Walks
Prabhupāda: All wrong. What is the... According to them, what is the distance of sun planet?
Paramahaṁsa: Sun planet is 93,000,000 miles.
Gaṇeśa: They say the moon planet is only 250,000 miles.
Prabhupāda: It is wrong thing.
Paramahaṁsa: Is their calculation for the distance of the sun wrong also?
Paramahaṁsa: 93,000,000? It says in the Bhāgavatam exactly what the distance?
Prabhupāda: The whole universe, diameter, is pañcaśat-koṭi-yojana. One yojana equal to eight miles, and one koti is ten miles, er, ten million. So pañcaśata, fifty into 10,000,000 into eight.
Paramahaṁsa: Yeah. So it's fifty crores yojana. Fifty crores yojanas?
Prabhupāda: Yes, fifty crore yojanas, pañcaśat. So one yojana equal to eight miles, one crore equal to ten million.
Paramahaṁsa: That's eighty million.
Paramahaṁsa: Eighty million times fifty.
Paramahaṁsa: Means 400,000,000
Śrutakīrti: Hmm. More than that. Four billion.
Paramahaṁsa: Four thousand million, which is four billion?
Śrutakīrti: Four billion miles.
Paramahaṁsa: Four billion miles is the diameter.
Prabhupāda: Is the diameter.
Paramahaṁsa: You gave that in The Teachings of Lord Caitanya also.Prabhupāda: Yes. And the sun is in the middle.
Prabhupāda: One universe. This is the smallest. Four-headed Brahma. [break] ...all universes taken together, that is one-fourth energy. And three-fourth energy is spiritual world. Ekāṁśena sthito jagat [Bg. 10.42], one part. [break] ...asat koṭi-yojana, one yojana equal to eight mile. And one koti means ten million. So fifty into eight, two hundred, into..., ten into ten million..., it comes. I have calculated four billion. How many millions make a billion?
Harikeśa: A thousand. [break]
Prabhupāda: Sun is situated in the middle from this circumference, two billion up and down. And the moon is situated above the sun, 1,600,000 miles. How they can go to the moon?
Devotee: They think the moon is closer than the sun.
Prabhupāda: They may think, but we are thinking in this way. Who is right?
Devotee: We are right, the Vedas.Prabhupāda: Yes. [break] ...thinking is right because they could not go to the moon. They say they went, but actually they could not. Now they are disappointed. [break]