Ten Mathematical Equations 2
Abstract
Two stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.
Description
"Einstein's Law" 20c. stamp depicting a "mushroom cloud, signifying an atomic explosion." "Tsiolkovsky's Law" 1cor. stamp depicting an Apollo spacecraft and Saturn rocket.
Keywords
Stamp collecting, Postage-stamp albums, Nicaragua, Einstein, Albert, 1879-1955, Nuclear explosions, Nuclear fission, T︠S︡iolkovskiĭ, K. (Konstantin), 1857-1935, Apollo (Spacecraft)