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Parsek

Parsek (az ikhtisori kalimahoi parallaks — ikhtilofi manzar va sekunda—soniya), vohidi astrono­mii masofa. Parsek masofaest, ki az on nimdiametri madori Zamin tadti kunji 1″ namoyon ast yo masofaest to sitora, ki parallaksi on ba 1″ ba­robar meboshad. Ishoratadp ps yo pk. 1 ps = 3.260 soli rushnoy = 3,0857X KhYu,v m.

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MUHAMMAD IBNI ABUBAKRI SAMARQANDI

MUHAMMAD IBNI ABUBAKRI SAMARQANDI (soli tavalludash nomalum — vafotash 1197, Sa­marqand), huquqshinosi fors-tojik. Doir ba …