SADI Muslihuddin Abumuhammad Abdulloh ibni Mushrifuddin (1203/8, Sheroz—1292, hamon jo), shoir, nasrnavis va mutafakkiri fors-tojik. …
Mufassal »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 …
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