One of the reasons Srila Prabhupada was convinced that current astronomical knowledge is incorrect, was because of the theory that the moon reflects the sun’s rays. Srila Prabhupada was convinced that dust could not provide the illumination that emanates from the moon. Regarding the moon, he said in a public lecture in New York on October 12, 1966, “And from your practical reason also, you can just understand that a lump of dust cannot be so brilliant so that it is illuminating the whole earth. It is not possible.” Also on December 14, 1999, lecturing on Caitanya Caritamrta, Madhya-lila 20.172, he said, “Just like they are thinking of this moon planet – a lump of dust. I cannot, of course, think like that. How dust can remain in a lump and how so much illumination come out from the dust? But they are putting the theory that the moon planet is a lump of dust.”