Sputnik 1 (/ˈspʌtnɪk, ˈspʊtnɪk/; see § Etymology) was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the USSR on 4 October 1957 as part of the Soviet space program. It orbited for three weeks before its batteries ran out. The satellite then silently continued to orbit the planet for two months before it fell back into the atmosphere on 4 January 1958.
invented by Fujio Masuoka
Flash memory (both NOR and NAND types) is invented in Japan by Fujio Masuoka…
invented by Frits Zernike
Phase-contrast microscopy (PCM) is an optical microscopy technique that…
invented by Konrad Zuse
The Z1 was a motor-driven mechanical computer designed by Konrad Zuse from 1936…
invented by United States of America
A thermonuclear weapon, fusion weapon or hydrogen bomb (H bomb) is a…
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