Orbiting Earth in the spaceship, I saw how beautiful our planet is. People, let us preserve and increase this beauty, not destroy it!
Облетев Землю в корабле-спутнике, я увидел, как прекрасна наша планета. Люди, будем хранить и преумножать эту красоту, а не разрушать её!
Original text (Russian)
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Russian phrase, handwritten and signed after his historic spaceflight, photo of facsimile published in Syny goluboi planety 3rd.edition (1981) by L. Lebedev, A. Romanov, and B/ Luk'ianov; the first edition was translated into English as Sons of the Blue Planet (1973) by L. A. Lebedev