Stamp: Virgil I. Grissom, Edward H. White, Roger B. Chaffee (Czechoslovakia 1973)

Virgil I. Grissom, Edward H. White, Roger B. Chaffee (Czechoslovakia 1973)

12 April (Czechoslovakia ) within release Space Research goes into circulation Stamp Virgil I. Grissom, Edward H. White, Roger B. Chaffee face value 3 Czechoslovakian koruna

Stamp Virgil I. Grissom, Edward H. White, Roger B. Chaffee in catalogues
Michel: Mi:CS 2135
Yvert et Tellier: Yt:CS 1980
POFIS: POF:CS 2023

Stamp is square format.

Also in the issue Space Research:

Data entry completed
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Stamp Virgil I. Grissom, Edward H. White, Roger B. Chaffee in digits
Country: Czechoslovakia
Date: 1973-04-12
Perforation: comb 11¾
Format: Stamp
Face Value: 3 Czechoslovakian koruna
Print run: 680000

Stamp Virgil I. Grissom, Edward H. White, Roger B. Chaffee it reflects the thematic directions:

Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust. The baseline temperature of outer space, as set by the background radiation from the Big Bang, is 2.7 kelvins (−270 °C; −455 °F)

Stamp, Virgil I. Grissom, Edward H. White, Roger B. Chaffee , Czechoslovakia,  , Outer Space